List of Thai monarchs

King of Thailand
พระมหากษัตริย์ไทย
Royal Standard (since 1910)
Incumbent
Vajiralongkorn (Rama X) since 13 October 2016
Details
Style	His Majesty
Heir presumptive	Dipangkorn Rasmijoti
First monarch	Si Inthrathit (contemporary) Phra Pathomsuriya (traditional)
Formation	1238 (1238) (contemporary) 757 (757) (traditional)
Residence	Grand Palace (ceremonial) Dusit Palace (residential)
Website	royaloffice.th

The modern order of succession of Thai monarchs begins with king Si Inthrathit who established the Sukhothai Kingdom in 1238, which is considered to be the first contemporary Tai-ethnic kingdom; it was ruled by Phra Ruang dynasty. Composing of 8 dynasties: Phra Ruang, Uthong, Suphannaphum, Sukhothai, Prasat Thong, Ban Phlu Luang, Thonburi, and Chakri. With brief interruptions, 55 monarchs and 27 viceroys have ruled over four successive kingdoms, the current monarch being Vajiralongkorn (Rama X) of the Chakri dynasty.

The modern perception is that there has been four distinct eras of Thai history, namely: Sukhothai, Ayutthaya, Thonburi, and Rattanakosin. However, the compilations of historical narratives from the old capital (pongsawadan krung kao) and the historical narratives from the king in the temple compiled by Prince Tisavarakumara, the Prince Damrong Rajanubhab, along with the Chronicles of Northern Kingdom's Histories included the Pre-Sukhothai and Pre-Ayutthaya monarchs as well.^[1] This means that the Sukhothai-Si Satchanalai city-states and the Siam Confederation and their monarchs is a part of the historical cannon as well.

Prior to the establishment of Sukhothai, Siam was a group of petty kingdoms shifting zones of influences and mandalas through wars and political marriages. Because of this, there are kingdoms and polities which existence may overlap, hence the monarchs' reigns will also overlap or even reign two polities at once. An example are Sukhothai and Ayutthaya. Ayutthaya, in the modern sense, was established during the reign of Maha Thammaracha I of Sukhothai in 1351 in which king Uthong V & Ramathibodi I (same person with two regnal names) inherited all of the confederation's polities – uniting them, hence the reign of Ayutthaya's monarchs overlaps with 4 monarchs of Sukhothai. An example for a monarch reigning multiple polities is when king Phanom Thale Sri who reigned both the Siam Confederation and the Sukhothai-Si Satchanai city-states (together 5 different polities) at the same time in 1155, while these polities were ran separately and equal to one another unlike the vassalage system in which a state is subservient to another.

The traditional accounts of the list starts with king Phra Pathomsuriya Thephanarathai Suwannabophit as the first king of all of Siam in 757 CE. He was the first king to unite petty kingdoms under one monarch. His descendants are of the Guruwamsa/Pathomsuriyawong dynasty, which is also the ancestors to most of the reigning dynasty of Sukhothai and Ayutthaya. In which, according to the traditional accounts, king Uthong V, the first king of Ayutthaya is canonically considered to be the 27th monarch of Siam. The number of monarchs up to today would total to 101 monarchs.

All of the mentioned titles are now defunct due to the abolition of the peerage

Khun — ขุน — Originally meaning “lord” or “chieftain,” Khun was a title used for local rulers or leaders of settlements. In later periods, is given to bureaucratic positions within government mostly to ministers, though a number of Shan states still retain this title for their rulers and kings. Originally a Tai word.

• Khun Ban Muang - King of Sukhothai
• Hkun Hseng Awng Tun - King of Hsenwi
• Khun Khreua - King of Lanna

Phaya — พญา (sometimes written พระยา in later periods) — Originally meaning “lord.” In later periods, this title is given to people governing second-tier or lower-class cities. This title is now an equivalent to the title Marquess. Originally a Pali-Sanskrit word. This title was also used in numerous other Tai-ethnic kingdoms in the regions. The title is also adapted to a couple of higher titles such as Chao Phaya and Somdet Chao Phaya. Which is equivalent to Duke and Grand Duke in that order, though these title holders often do not hold fief / territory. Though when they do hold hand, it is tantamount to half the nation, such as the position of the prime minister of northern Siam, comes with the position of grand duke. The title is defunct. This title is also bestowed upon vassal kings and monarchs.

• Phaya Loe Thai - King of Sukhothai
• Phaya Mangrai - King of Lanna
• Phraya Kakawannathiparatcha Wachiraprakarn - Princely monarch of Chiang Mai
• Phaya Khun Fong - monarch of Nan (a mixture of the title Phaya and Khun)

Pho Khun — พ่อขุน — Originally meaning “lord father.” It reflects the paternal kingship ideology of the Sukhothai era, in which the king was regarded as a benevolent father to his subjects. The title is now defunct. Originally a Tai word.

• Pho Khun Ram Khamhaeng - King of Sukhothai

Pu Khun — ปู่ขุน — Originally meaning “lord grandfather.” It is a term to used for deceased rulers. The title is now defunct. Originally a Tai word.

Pu Phaya — ปู่พญา — Originally meaning “lord grandfather.” It is a term to used for deceased rulers. The title is now defunct. Originally a Tai + Pali-Sanskrit word.

Phrabat Kamrateng An Sri — พระบาทกัมรเตงอัญศรี — The monarch also adopted the Khmer prestige title Kamrateng An (Thai: กมฺรเตงฺ อญฺ), meaning "our lord", as regnal title.^[2] The title is now defunct. Originally a Khmer word.

• Kamrateng An Sri Inthrabodinthrathit - King of Sukhothai

All of the mentioned titles are now defunct due to the abolishment of the peerage, except the title of Phra Chao and onwards

Muen — หมื่น — Originally meaning "officer/baron." It is a title typically bestowed upon vassal king or a regional monarch and is not normally used on the kings of the Chao Phraya basin. The title is now defunct. In the chao phraya basin, it is bestowed upon officers within the central government.

• Muen Soi Chiang Khong - Princely monarch of Nan

Thao — ท้าว — Originally meaning "lord/lady/sir/dame." It is a title typically bestowed upon a vassal king or a regional monarch and is not normally used on the kings of the Chao Phraya basin. The title is now defunct. In the chao phraya basin, it is bestowed upon officers within the central government and/or people who have achieved a great feat, akin to a knight or dame.

• Thao Kha Kan - King of Nan
• Thao Sunannari - Dame Duchess of Nakhon Rachasima
• Thao Chai - King of Lanna

Khun Luang — ขุนหลวง — Originally meaning “royal chief.” It is used for informal reference of the king. The title is now defunct.

Phra — พระ — Originally meaning “royal or holy.” The title is now defunct. It was also used in the Sukhothai era.

• Phra Chetthathirat - King of Ayutthaya

Chao Luang — เจ้าหลวง — Originally meaning “royal lord.” It is a title typically bestowed upon vassal king or a regional monarch and is not normally used on the kings of the Chao Phraya basin. The title is now defunct.

• Chao Luang Chaiyawongse - Princely monarch of Lampang

Chao Fa — เจ้าฟ้า — Originally meaning “celestial prince / celestial lord." usually used for viceroys and princes. It was used to refer to a number of Shan states still retain this title for their rulers and kings. The title is now defunct.

• Chao Fa Krom Khun Intharaphitak - Viceroy of Thonburi
• Hso Lung Hpa - King of Mohnyin (Chao Fa is usually separated in Shan titles)
• Sukaphaa - King of Ahom
• Chao Fa Nhor Muang - King of Nan

Krom Phrarachawang Baworn — กรมพระราชวังบวร — Originally meaning “Royal Front Palace Lord." The title is now defunct.

• Krom Phrarachawang Baworn Wichaichan - Viceroy of Rattanakosin

Somdet Phra Baworn Rat Chao — สมเด็จพระบวรราชเจ้า — Originally meaning “Royal Highness the Exalted Vice-King." The title is now defunct.

• Somdet Phra Baworn Rat Chao Maha Senanurak - Viceroy of Rattanakosin

Phra Chao — พระเจ้า — Originally meaning “god.” It is used for informal reference of the king. Though it is informal to refer to the chao phraya kingdom's king, it is nontheless the formal way to refer to the northern and other regional monarchs.

• Phra Chao Uthong II - King of the Siamese Confederation
• Phra Chao Taksin - King of Thonburi
• Phra Chao Kawilalolot Suriyawongse - King of Chiang Mai
• Phra Chao Tilokkarat - King of Lanna
• Phra Chao Suriyaphong Pharitdet - King of Nan

Chao — เจ้า — Originally meaning “lord/prince/master." It is commonly used for loyalty and noblemen. The title is used to refer to a number of Shan states still retain this title for their rulers and kings.

• Chao Sam Phaya - King of Ayutthaya
• Sao Kawng Kiao Intaleng - King of Kengtung (Chiang Tung)
• Chao Kaew Nawarat - Princely monarch of Chiang Mai

Phrabat Somdet — พระบาทสมเด็จ — Originally meaning "Most Exalted Majesty."

Somdet Phra — สมเด็จพระ — Originally meaning "Exalted Majesty."

Phrabat Somdet Phra — พระบาทสมเด็จพระ — Originally meaning "Most Exalted Royal Majesty."

Phrabat Somdet Phra Chao — พระบาทสมเด็จพระเจ้า — Originally meaning "Most Exalted Majesty the Lord."

Phrabat Somdet Phra Poramenthara ... Chao Yu Hua — พระบาทสมเด็จพระปรเมนทร...เจ้าอยู่หัว — Originally meaning “His Most Exalted Majesty the Supreme Sovereign, the Lord Above Our Heads.”

In the Sukhothai Kingdom, the monarch used the title Khun (Thai: ขุน) or Phaya (Thai: พญา), while Pho Khun/ Phaya (Thai: พ่อขุน/ พ่อพญา) or Phoo Khun/ Phaya (Thai: ปู่ขุน/ ปู่พญา) were used to refer to deceased monarchs or senior relatives who were monarchs.^[3] The monarch also adopted the Khmer prestige title Kamrateng An (Thai: กมฺรเตงฺ อญฺ), meaning "our lord", as regnal title.^[2]

In the Ayutthaya Kingdom and afterward, thanandon, the system of Thai royal titles, determines the style of the monarch's full regnal name (which includes the title), consisting of two interconnected parts:

• The first part is the title Phra Bat Somdet Phra Chao Yu Hua (Thai: พระบาทสมเด็จพระเจ้าอยู่หัว, 'His Majesty the King'). The title is split by the regnal name, written between Phra and Chao. If the monarch was not formally crowned, Phra Bat is omitted. If the monarch ruled as a tributary or was usurped, Somdet may be omitted.
  • Sometimes, Chao Yu Hua is fully omitted. Other times, only Yu Hua is omitted, in which case Chao follows the remaining components of the title and precedes the regnal name.
• The second part is the regnal name, of which only a portion may be used to commonly refer to the monarch. It may differ from their birth name, their name as uparaja (viceroy), or their posthumous name and/or historical style. This list refers to monarchs by the names most often used by traditional historians.^[4]

Western nations referred to the monarch as the "King of Siam" (Latin: Rex Siamensium), regardless of Thai titles, since the initiation of relations in the 16th century. Mongkut (Rama IV) was the first monarch to adopt the title when the name Siam was first used in an international treaty.^[5] When the kingdom's name was changed to Thailand, the monarch's Western title changed accordingly.^[6]

Due to intermarriages between Siamese polities, dynasties are usually branches or cadet branches of an already existing house. A dynasty may also arise from a minor member of a house through the right of conquest.

Pathomsuriyawong Dynasty (700-1351) - the line of Phra Pathomsuriya Thephanarathai Suwannabophit (b.742; d.800)

Aphaikhamini Dynasty (957–c.1100s) - the line of Phraya Aphaikhamini (d.959)

Phra Ruang Dynasty (1238–1438; 1468–1474) - the line of Inthrabodinthrathit (b.1188; d.1270) elder son of Sri Singha of Pathomsuriyawong. Inthrabodinthrathit overthrew Thao Saen Pom king of Suphannaphum who was reigning Sukhothai-Si Satchanalai at the time thus establishing the Sukhothai Kingdom. Came to power using the right of conquest.

• 2nd Suphannaphum Dynasty (1409–1569) - the line of Nakhon Intharachathirat (b.1359; d.1424) mother from Loe Thai of Phra Ruang Dynasty, he is the son of Borommarachathirat I. Nakhon Intharachathirat, king of the constituent kingdom of Suphannaphum overthrew king Ramrachathirat. Came to power using the right of conquest.

• Sukhothai Dynasty (1569–1629) - the line of Sanphet I (b.1509; d.1590) known relation to Phra Ruang Dynasty but unknown exact relation. Sanphet I, Marquess of Phitsanulok was installed by the Burmese emperor Bayinnaung as a vassal king. Came to power using the right of vassalage.
  • Prasat Thong Dynasty (1629–1688) - the line of Sanphet V (b.1599; d.1655) as son of Sanphet III or maternal-cousin of Borommaracha I, both of Sukhothai Dynasty. Sanphet V, Defence Minister and Marquess Prime Minister of Ayutthaya overthrew king Athittayawong. Came to power using the right of conquest.
    • Ban Phlu Luang Dynasty (1688–1767) - the line of Sanphet VIII (b.1661; d.1709) from Ramathibodi III (b.1632; d.1688) son of Sanphet V of Prasat Thong Dynasty. King Phetracha, Elephant Corps Minister and General of the Ayutthaya Army overthrew king Ramathibodi III. He later passed on the throne to his adoptive son Sanphet VIII. Came to power using the right of conquest.
  • Chakri Dynasty (1782–present) - the line of Rama I (b.1737; d.1809) from Duke Kosa Pan (b.1633; d.1699) grandson of Sanphet III (b.1557; d.1610) of Sukhothai Dynasty. Rama I, former Count of Ratburi, Grand Duke Prime Minister of Thonburi overthrew king Sanphet X. Came to power using the right of conquest.

Uthong Dynasty (1351–1370) - the line of Uthong V & Ramathibodi I (b.1314; d.1369) mother is from Anuracha (b.1112; d.1167) younger son of Sri Singha of Pathomsuriyawong. Uthong V & Ramathibodi I had inherited all of the Dvaravati polities by 1351. His title is Uthong V of Suphannaphum and Phripphri and Ramathibodi I of Ayothaya and Lavo. Came to power using the right of inhertiance.

Uthong Dynasty (1351–1370) - the line of Uthong V & Ramathibodi I (b.1314; d.1369) father is Borommaracha (d.1344) son of Thammatrilok of Aphaikhamini

Thonburi Dynasty (1767–1782) - the line of Sanphet X (b.1734; d.1782). Marquess of Tak reunited the kingdom after the disintegration of the kingom of Ayutthaya into 5 different kingdoms. Came to power using the right of conquest.

1st Suphannaphum Dynasty (1370–1388) - the line of Borommarachathirat I (b.1310; d.1388) father is Uthong III of Suphannaphum. Borommarachathirat I, king of the constituent kingdom of Suphannaphum overthrew king Ramesuan. Came to power using the right of conquest.

In Siam, the relationship between the king and the viceroy (called the Uparaja) was based on shared rule but clear hierarchy. The king was the highest ruler, while the viceroy was usually a close relative chosen to help govern and serve as the likely successor, though this would often prove false due to other members of the family starting a succession war. The viceroy had real authority, controlling parts of the kingdom and managing government and military affairs when needed. However, all power officially came from the king, and the viceroy was expected to support and follow the monarch’s decisions. Because the viceroy had his own court and influence, this system sometimes led to rivalry or competition between the two.

The viceroys had their own palace and administration in the front palace.

The position continued for many centuries until King Chulalongkorn abolished it in the late 19th century to centralize power under the monarchy.

While the viceroy is not the king, throughout the history of Siam, there were moments where these viceroys were crowned "in equal power" as the monarch, like the coronation of Rama IV and Pinklao. In which king Pinklao was crowned using the title Phrabat Somdet Phra .... Chao Yu Hua in equal ranking to the first king. Thus, allowing the front palace to institute the first king's regalia and ornamentation within the front palace which had previously been forbidden.

The deputy viceroys had their own palace and administration in the rear palace. The deputy viceroy position was seldom bestowed. There had only been three bestowals in the last 700 years. This role is similar to the viceroys but are subservient to the king and the viceroy.

List of deputy viceroys
Regnal name	Reign from	Reign until	Notes
Nai Chobkhotchaprasit นายจบคชประสิทธิ์	c.1680s
Chao Fa Phon เจ้าฟ้าพร	1703	1708	became king King Maha Thammarachathirat II
Somdet Phra Chao Lanthoe Chao Fa Thong In Krom Phra Rachawang Bawornsathan Phimuk สมเด็จพระเจ้าหลานเธอ เจ้าฟ้าทองอิน กรมพระราชวังบวรสถานภิมุข	1782	1806
vacant until the abolition of the front palace and the rear palace

Co-kings were monarchs which had previously abdicated, but were invited back to power. Often they were brought back with the same amount of authority as the main king. Though this usually didn't last and often voluntarily relinquished power and even refused a third co-kingship. A famous example is when King Maha Thammarachathirat III was invited back into the position of king during King Borommaracha III's reign.

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
1		Inthrachaithirat[7] อินทราไชยธิราช		679 – 687 (9 years)	First king of a Sukhothai polity	Overthrown by Phalithirat

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
2		Phalithirat[8] พาลีธิราช		687 – c.700s	Usurper Overthrew Inthrachaithirat	Son of Kalavarnadisharaja, the first King of Lavo
Dvaravati suzerainty era the city was abandoned

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
3		Phra Chao Suthammaracha พระเจ้าสุธรรมราชา		c.930s – 957	Son of Sai Nam Phueng I	Reigned from Phitsanulok Also King of Phraek Si Racha

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
Haripunchai suzerainty era abandoned until 957
4		Phraya Aphaikhamini[9] พระยาอภัยคามินี		957 – 959 (2 years)	Refounded a Sukhothai polity	A Mon noble who fled Haripunchai
5		Phraya Sri Chanthrathibodi[9] พระยาศรีจันทราธิบดี		959 – c.900s	Offered the throne (not related)	A Lavo commoner Fled Phraek Si Racha polity because Phra Chao Sinthop Amarin had ordered his arrest to become a monk.
As the free city-state of Si Satchanalai–Sukhodaya
6		Somdet Phra Arunarat[10] สมเด็จพระอรุณราช	Chao Anuratcha Kuman เจ้าอรุณราชกุมาร	c.1000s – 1052	A son of Aphaikhamini Offered the throne
7		Chao Suphatcharat เจ้าพัตตาสุจราช	Chao Pasuja Kuman เจ้าพสุจกุมาร	1052 – c.1000s	Son of Arunarat
8		Phra Chao Thammatrailok พระเจ้าธรรมไตรโลก		c.1100s	Son of the Suphatcharat	Father of Ayothaya kings, Thammaracha and Borommaracha Father-in-law of Kesariraja Grandfather of Uthong V of Ayutthaya
9		Chao Rachathirat เจ้าราชาธิราช		c.1100s	Son of the Thammatrailok
City-state is partitioned into Sukhothai and Si Satchanalai, after this the city was ruled from Si-Satchanalai

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
Indaprasthanagara suzerainty era (Phraek Si Racha Polity)
10		Phra Phanom Thale Sri พระพนมทะเลศรี or Mahesavasatithrathiratchakasat มเหศวสติทราธิราชกษัตริย์	Intharacha อินทราชา	1155 – 1157 (2 years)	Phra Pathomsuriya Thephanarathai Suwannabophit lineage Grandson of Sri Singha Conquered Sukhothai	Also King of Lavo (1150–1155), King of Singburi (1169–1188), and King of Phrip Phri (1188–1225) Traditionally considered the 23rd king of Siam. Descended from the a son of Sri Singha, Anuracha
11		Phra Chao Suriyaracha พระเจ้าสุริยราชา		1157 – 1184 (27 years)	Cousin of Phanom Thale Sri	Also king of Kamphaeng Phet Descended from the a son of Sri Singha, Suriyawong
De facto independent
12		Phra Chao Chantharacha พระเจ้าจันทราชา	Phra Chantha Kuman พระจันทกุมาร	1184 – 1214 (30 years)	Son of the Suriyaracha	Stopped sending tribute to Khmer Empire Father of Kamrateng An Sri Inthrabodinthrathit, first independent king of Sukhothai
13		E Daeng Phloeng อีแดงเพลิง		1214 – 1219 (5 years)	Usurper (not related)	Possibly a Mon, name found in the Wat Si Chum Inscription

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
remerged as city-state of Si Satchanalai–Sukhodaya
14		Pho Khun Sri Naw Nam Thum พ่อขุนศรีนาวนำถุม		1219 – c.1200s	Usurper, Noble of Chaliang Overthrew E Daeng Phloeng	Noble from Si Satchanalai overthrowing E Daeng Phloeng, also a possible king of Sri Satchanalai

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
remerged as city-state of Si Satchanalai–Sukhodaya
15		Khom Sabat Khlon Lamphong ขอมสบาดโขลญลำพง	Thao Saen Pom ท้าวแสนปม	c.1200s	Usurper	Also king of Suphannaphum Grandfather-in-law to Uthong V Grandfather to Borommarachathirat I

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
remerged as city-state of Si Satchanalai–Sukhodaya
16		Pho Khun Pha Muang พ่อขุนผาเมือง		c.1200s – 1238 (around 5 years)	Son of Sri Naw Nam Thum Overthrew Khom Sabat Khlon Lamphong	Friend and ally of Inthrabodinthrathit Brother-in-law of Inthrabodinthrathit

Tai peoples migrated into mainland Southeast Asia in the 8th–10th centuries.^[11] In the years after, Northern Thai groups established mueang that evolved into larger states, such as Ngoenyang.^[12][13] However, it was not until the decline of the Khmer Empire in the 13th century that a Central Thai kingdom politically and culturally related to modern Thailand was first founded.

The Phra Ruang dynasty was the only royal lineage that ruled over the Sukhothai Kingdom, the first Central Thai state. Established by Si Inthrathit in 1238, who declared independence from the Khmer Empire, the dynasty laid the foundations for Thai society.^[14] Under Ram Khamhaeng the Great, the initial Thai script was invented and Theravāda Buddhism was established as the state religion.^{[15]: 197 [16]: 25}

The dynasty is named after the Traiphum Phra Ruang, a Buddhist cosmology book written by Maha Thammaracha I. During his reign, the kingdom was invaded by Ayutthaya, a neighboring Thai state, becoming a tributary during the reign of Maha Thammaracha II.^[15]: 222

In the Sukhothai Kingdom, the monarch ruled from the city of Sukhothai, while the heir presumptive would occasionally be named uparaja, or viceroy, and ruled in Si Satchanalai. In 1438, Ayutthaya annexed Sukhothai at the death of Maha Thammaracha IV when Borommarachathirat II of Ayutthaya named his son Prince Ramesuan uparaja. In Ayutthaya, the tradition would evolve into the Front Palace system.^[17]

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Life details	Viceroy
1		Kamrateng An Sri Inthrabodinthrathit กมรเตงอัญศรีอินทรบดินทราทิตย์	Pho Khun Si Inthrathit พ่อขุนศรีอินทราทิตย์ or Khun Bang Klang Hao ขุนบางกลางหาว	House Si Inthrathit	1238 – 1270 (32 years)	First King of Sukhothai Son of Chantharacha Descendant of Phra Pathomsuriya Thephanarathai Suwannabophit Founded a new Dynasty	1188 – 1270 (aged 82) Ruled locally in the Khmer Empire as Bang Klang Hao. His rebellion led to the establishment of Sukhothai, the first Central Thai kingdom[18] Originally of Pathomsuriyawong Dynasty	Vacant
2		Khun Ban Mueang ขุนบานเมือง	Ban บาน		1270 – 1279 (9 years)	Son of Si Inthrathit	c. 1237 – 1279 (aged approx. 42) Namesake for birth name of Maha Thammaracha IV[19]	Ram (brother)
3		Phrabat Kamrateng An Sri Rammarat พระบาทกมรเตงอัญศรีรามราช	Pho Khun Ram Khamhaeng the Great พ่อขุนรามคำแหงมหาราช	House Ram Khamhaeng	1279 – 1298 (19 years)	Son of Si Inthrathit	c. 1237/1247 – 1298 (aged approx. 51/61) Oversaw the height of Sukhothai prosperity, the development of the Thai script, and the propagation of Theravada Buddhism within Sukhothai[15]	Vacant
—		Phaya Sai Songkhram พญาไสสงคราม			1298	Son of Ram Khamhaeng	late c.1200s – unknown (aged approx. 51/61) Reigned as regent until Loe Thai ascended
4		Phraya Loe Thai พระยาเลอไทย			1298 – 1323 (25 years)	Son of Ram Khamhaeng	c. 1262 – 1323 (aged approx. 61) Brother of Burmese queen consort May Hnin Thwe-Da.[20] His reign saw the decline of Sukhothai, as regions conquered by Ram Khamhaeng broke away	Li Thai (son)
5		Phraya Ngua Nam Thum พระยางั่วนำถุม		House Si Inthrathit	1323 – 1347 (24 years)	Son of Ban Mueang	c. 1266 – 1347 (aged approx. 81) Brother of Burmese queen consort May Hnin Htapi.[21] Origin of his name is disputed[22]	Li Thai (nephew)
—		name unknown			1347	Son of Ngua Nam Thum	(late c.1200s to c.1300s) – c.1347 (aged approx. unknown) Crowned after Ngua Nam Thum, then Li Thai, then lord of Si Satchanalai and viceroy, marched his army and overthrown a son of Ngua Nam Thum in a coup where "he killed all his enemies".[23]	Vacant
6		Phrabat Kamrateng An Sri Suriyaphong Ram Maha Thammarachathirat พระบาทกมรเตงอัญศรีสุริยพงษ์รามมหาธรรมราชาธิราช and Phra Maha Thammaracha I พระมหาธรรมราชาที่ ๑	Phraya Li Thai พระยาลิไทย and Luethai[24] ฦๅไทย	House Ram Khamhaeng	1347 – 1368 (21 years)	Son of Loe Thai Overthrew son of Ngua Nam Thum	c. 1300 – 1368 (aged approx. 68) Known for his devotion to Buddhist philosophy and writing.[25] During his reign, Ayutthaya began to invade into Sukhothai[15]
1378: Sukhothai became a tributary state of the Ayutthaya Kingdom
7		Phra Maha Thammaracha II พระมหาธรรมราชาที่ ๒	Phraya Lue Thai พระยาลือไทย	House Ram Khamhaeng	1368 – c. 1400 (approx. 32 years)	Son of Maha Thammaracha I	c. 1358 – 1400 (aged approx. 42) Born Lue Thai. Under his rule, the dynasty continued under tributary status[15]	Vacant
8		Phra Maha Thammaracha III พระมหาธรรมราชาที่ ๓ or Somdet Maha Thammarachathibodi Sri Suriyawong สมเด็จ มหาธรรมราชาธิบดี ศรีสุริยวงศ์	Phraya Sai Lue Thai พระยาไสลือไทย		c. 1400 – 1419 (approx. 19 years)	Son of Maha Thammaracha II	c. 1380 – 1419 (aged approx. 39) Born Sai Lue Thai
9		Phra Maha Thammaracha IV พระมหาธรรมราชาที่ ๔	Phraya Borommapan พระยาบรมปาล		1419 – 1438 (19 years)	Son of Maha Thammaracha III Succession War	c. 1401 – 1438 (aged approx. 37) Born Borommapan. Won the throne against his brother after the intervention of King Intharachathirat of Ayutthaya.[26] Upon his death, King Borommarachathirat II of Ayutthaya installed his son as uparaja, ending the Phra Ruang succession[17]	Yutthisathian (son)
1438: De facto annexation into Ayutthaya, ending Sukhothai autonomy
—		Phraya Yutthisathian พระยายุทธิษเฐียร		House Ram Khamhaeng	1468 – 1474 (6 years)	Son of Maha Thammaracha IV	c.1420s – c.1480s (mentioned) (aged approx. 60) Was to be appointed the viceroy under Borommatrailokkanat, instead was appointed Phraya Songkhwae (Phitsanulok). Sometime later, he was appointed viceroy of Sukhothai. Removed as viceroy, stripped of all titles and lands	Vacant
1529: De jure annexation into Ayutthaya, as the position of Viceroy (Uparat) of Sukhothai was now defunct

No.	Portrait	Regnal name	Personal name	Reign	Succession	Life details	Viceroy
—		Somdet Phra Borommatrailokkanat สมเด็จพระบรมไตรโลกนาถ	Phra Ramesuan (II) พระราเมศวร (ที่๒)	1438 – 1468 (30 years)	Grandson of Maha Thammaracha II Son of Borommarachathirat II	1431 – 1488 (aged approx. 57) Installed by Borommarachathirat II as viceroy of Sukhothai, tying Sukhothai in a personal union after becoming king of Ayutthaya.	Vacant
				1474 – 1485 (11 years)		Second reign due to the removal of Yutthisathian
—		Somdet Phra Ramathibodi II สมเด็จพระรามาธิบดีที่ ๒	Phra Chetthathirat พระเชษฐาธิราช	1485 – 1529 (44 years)	Great-Grandson of Maha Thammaracha II Son of Borommatrailokkanat	1472 – 1529 (aged approx. 57) Installed by Borommatrailokkanat as viceroy of Sukhothai	Vacant
1529: De jure annexation into Ayutthaya, as the position of Viceroy (Uparat) of Sukhothai was now defunct

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
Founding of Phraek Si Racha
1		Komerat โกเมราช		House Komerat	700 – c.700s	Founded Phraek Si Racha polity
2		Ketumala เกตุมาลา			c.700s – 757	Son of Komerat	concurrent with king Phalitbodichai of Lavo
3		Phra Pathomsuriya Thephanarathai Suwannabophit พระปฐมสุริยเทพนรไทยสุวรรณบพิตร or Somdet Phra Pathom Suriya Narani Saworabophit สมเด็จพระปฐมสุริยนาราณีศวรบพิตร			757 – 800 (43 years)	Adopted Son of Ketumala	Canonically the first king of all Siam, the ancestor to both Sukhothai and Ayutthaya monarchs. King of all Dvaravati polity: Nakhon Pathom, Si Thep, Phraek Si Racha, and Lopburi. Recorded name: Pra Poat honne Sourittep pennaratui sonanne bopitra
4		Pathum Kuman ปทุมกุมาร			800 – c.800s	Son of Pathomsuriya	concurrent with king Sikarat of Kamlanka
Fell under Si Thep c.800s - 859

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
5		Athitayarat อาทิตยราช		House Athitayarat	c.800s – 859 (around 25 years)	Usurper	Also king of Syamapura (Sithep) Obtained the emerald buddha into Siamese hands concurrent with king Sikarat of Kamlanka concurrent with king Kamsa of Kamlanka concurrent with king Padum Kumara of Phraek Si Racha

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
6		Phra Chao Pharattakap พระเจ้าภะรัตกับ		House Pharattakap	859 – 892 (33 years)	Usurper	concurrent with king Vasuthep of Lavo concurrent with king Balarat of Kamlanka concurrent with king Bhagadatta of Si Thep

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
7		Phra Chao Sai Nam Phueng I พระเจ้าสายน้ำผึ้งที่ ๑		House Suthammaracha	892 – 922 (30 years)	Usurper	Former noble in the court of the previous concurrent with king Balarat of Kamlanka concurrent with king Uchitthaka of Lavo concurrent with Sri Suntharaprakrom of Si Thep
8		Phra Chao Suthammaracha พระเจ้าสุธรรมราชา			922 – 957 (35 years)	Son of Sai Nam Phueng I	concurrent with Si Suntharavoraman of Si Thep concurrent with Narupati Singhavoraman of Si Thep
Polity splits into two branches: Phraek Si Racha and Phitsanulok

No.	Portrait	Regnal name	Personal name	Reign	Succession	Notes
9		Phra Chao Sinthop Amarin พระเจ้าสินธพอมรินทร์	Phraya Kraek พญาแกรก	937 – 996 (59 years) concurent with the former	Usurper	Unified Phraek Sri Racha and Ayothaya-Lopburi

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
10		Phra Chao Wisanuracha พระเจ้าวิษณุราชา		House Wisanu	957 – 987 (30 years)	Phra Pathomsuriya Thephanarathai Suwannabophit lineage (Exact relation unknown)	Phitsanulok line. King of a Dvaravati polity: Phitsanulok. Incursions by the Khmer empire, prompted the polity to lose influence around Lopburi and Phraek Si Racha concurrent with Sunthorathet of Phraek and Lavo concurrent with Pansa of Suphannaphum
11		Phaya Sunthorathet Mahathepharat พญาสุนทรเทศมหาเทพราช		House Sunthorathet	996 –1005 (9 years) concurent with the former and latter	Phra Pathomsuriya Thephanarathai Suwannabophit lineage (Exact relation unknown)	Phraek Si Racha line Canonically the 11th king of all Siam. King of two Dvaravati polity: Lopburi and Phraek Si Racha. Recorded name: Ipoia Sanne Thora Thesma Teperat End of his line concurrent with Wisanuracha of Phitsanulok
12		Phra Chao Pichairacha พระเจ้าพิไชยราชา		House Phichai	987 – 1027 (40 years)	Younger Brother of Wisanuracha	great-great-great grandfather of Si Intharathit great-great grandfather of Uthong II concurrent with Pansa of Suphannaphum concurrent with Rampandit of Suphannaphum
13		Phra Chao Sri Singha พระเจ้าศรีสิงห์			1027 – 1062 (35 years)	Son of Pichairacha	concurrent with Ang Indra of Suphannaphum concurrent with Chantharachot of Lavo
Civil war in the Chao Phraya basin
14		Phra Chao Surintharacha พระเจ้าสุรินทราชา		House Pichai	1062 – 1100 (38 years)	Son of Sri Singha	concurrent with all 8 monarchs of Jayasimhapuri concurrent with Kar Tayy of Suphannaphum concurrent with Narai of Lavo
Lavo and Ayothaya splits off
15		Phra Chao Suriyawong พระเจ้าพระสุริยวงศ์		House Suriyawong	1100 – 1132 (32 years)	Younger Brother of Suriyawong	concurrent with Sri Thammasokarat I of Nakhon Si Thammarat and Phraek Si Racha concurrent with Kesariracha of Lavo
Phraek Si Racha splits, Chai Nat line continues through the first son of Sri Singha, Surintharacha. Sing buri line continues to the second son, Anuracha. (Chai Nat line later ruling Ayutthaya, and Singburi line later ruling Sukhothai) Pathom Suriyawong dynasty lost control until Uthong II regained control of the region.

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
Incursions from Haripunchai
16		Phra Chantharachot พระจันทรโชติ		House Chantharachot	1052–1069 (17 years) concurent with the former	Usurper Son of Chanthrathewarat of Suphannaphum	Originally a Suphannaphum prince, his older brother ruled Haripunchai, and then usurped the Lavo throne, enthroning Chandrachota concurrent with Ang Indra of Suphannaphum concurrent with Sri Singha of Phraek Si Racha
17		Phra Narai พระนารายณ์			1069 – 1087 (18 years) concurent with the former	Son of Chandrachota of Lavo	Founded modern Ayutthaya city and king of Lavo concurrent with Kar Tayy of Suphannaphum concurrent with Surintharacha of Phraek Si Racha
War of the nine Ayothaya clans
vacant 1087-1089

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
War of the nine Ayothaya clans
18		Phra Chao Luang พระเจ้าหลวง		House Luang	1089 – 1111 (22 years)	Usurper	concurrent with Suriyawang of Phraek Si Racha

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
19		Phra Chao Sai Nam Peung II พระเจ้าสายน้ำผึ้งที่ ๒		House Thammikkaracha	1111 – 1165 (54 years)	Offered the throne	Commoner concurrent with Sri Thammasokarat II of Nakhon Si Thammarat, Praek Sri Racha and Lavo concurrent with Phanom Thale Sri of Siam
20		Phra Chao Thammikkaracha พระเจ้าธรรมิกราชา			1165 – 1205 (40 years)	Son of Sai Nam Peung	Full regnal name according to the Miscellaneous Laws (Phra Aiyakan Betset) under the parent law, Three Seals Law, enacted in 1225 AD (BE 1768): Phrabat Somdet Phra Ramathibodi Sriwisutthiburusodom Borommachakkraphat Thammikaraja Dechochaithepadithep Triphuwanathibet Barombophit Phra Phutthi Chao Yu Hua (Thai: พระบาทสมเดจ์พระรามาธิบดีศรีวิสุทธิบุรุโสดมบรมจักรพรรดิธรรมิกกราชเดโชไชเทพาดิเทพตรีภูวนาธิเบศ บรมบพิตรพระพุทธิเจ้าอยู่หัว) concurrent with Phanom Thale Sri of Siam concurrent with Uthong I of Suphannaphum

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
21		Phra Chao Lop Mahasombat พระเจ้าโลภมหาสมบัติ (posthumous)	Phra Chao Anuracha พระเจ้าอนุราชา	House Anuracha	1132– 1167 (35 years) concurent with the former	Phra Pathomsuriya Thephanarathai Suwannabophit lineage Son of Sri Singha Overthrew Suriyawong (brother)	Overthrew Suriyawong, moved capital from Chai Nat to Singburi concurrent with Sai Nam Peung II of Ayothaya
(-)		Phra Chao Uthong I พระเจ้าอู่ทองที่ ๑			1163– 1205 (42 years) concurent with the former	Son of Anuracha	Ruled in Suphannaphum and Jayasimhapuri concurrent with Sai Nam Peung II of Ayothaya concurrent with Phanom Thale Sri of Siam concurrent with Anuracha of Singburi

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
22		Sri Thammasokarat II ศรีธรรมโศกราชที่ ๒ or Chantharaphanu I จันทรภาณุที่ ๑	Phaya Narabodi พญานรบดี	House Thammasokarat	1167 – 1180 (13 years)	Usurper	Line of Nakhon si Thammarat kings Got removed from the Chao Phraya Basin area, and continued ruling the Kra Isthmus concurrent with Sai Nam Peung II of Ayothaya concurrent with Phanom Thale Sri of Siam

No.	Portrait	Regnal name	Personal name	House	Reign	Succession	Notes
The confederation is consolidated under Phra Phanom Thale Sri
23		Phra Phanom Thale Sri พระพนมทะเลศรี or Mahesavasatithrathiratchakasat มเหศวสติทราธิราชกษัตริย์	Intharacha อินทราชา	House Phetchaburi - Viang Chaiprakarn	1180– 1205 (25 years)	Phra Pathomsuriya Thephanarathai Suwannabophit lineage Grandson of Sri Singha Son of Anuracha Brother of Uthong I Overthrew Sri Thammasokarat II	Son of Anuracha Brother of Uthong I of Suphannaphum Canonically the 23th king of all Siam. King of five Dvaravati polity: Lopburi, Phraek Si Racha, Phripphri, Sukhothai-Nakhon Thai, and Singburi. Recorded name: Pra Poa Noome Thele Seri concurrent with king Thammikkaracha of Ayothaya concurrent with Uthong I of Suphannaphum
24		Phra Chao Uthong II พระเจ้าอู่ทองที่ ๒ or Mahitharaworaman III มหิธรวรมันที่ ๓			1205 – 1253 (48 years)	Son of Phra Phanom Thale Sri Son-in-law of Thammikkaracha	Grandson of Anuracha Great-grandson of Sri Singha concurrent with Thao Saen Pom of Suphannaphum concurrent with king Thonglanrach of Phrippphri
25		Phra Chao Chaiyasen พระเจ้าชัยเสน		House Chaiyasen	1253 – 1289 (36 years)	Son-in-law of Uthong II	concurrent with Uthong III of Suphannaphum
26		Phra Chao Suwannaracha พระเจ้าสุวรรณราชา	Chao Suwanna Kuman เจ้าสุวรรณกุมาร	House Phetchaburi - Viang Chaiprakarn	1289 – 1301 (12 years)	Grandson of Uthong II Son of Chaiyathat of Uthong II Adopted son of Chaiyasen Nephew of Chaiyasen	Xiān began to invade Angkor and Melayu in the 1290s. Xiān sent tributes to China five times during 1292 to 1299.
27		Phrachao Thammaracha พระเจ้าธรรมราชา		House Thammaracha	1301 – 1310 (9 years)	Son-in-law of Suwannaracha. Pathomsuriyawong Dynasty (by marriage)	Son of Thammatrailok of Sukhothai-Si Satchanalai Originally of Aphaikhamini Dynasty
28		Phrabat Somdet Phrachao Ramathibodi Sri Wisuthisuthiwong Ongkhapurisodom Borommachakkraphat Rachathirat Triphuwanathibet Borombophit Phraphuttha Chao Yu Hua พระบาทสมเด็จพระเจ้ารามาธิบดีศรี วิสุทธิสุธิวงศ์องคปุริโสดม บรมจักรพรรดิราชาธิราชตรีภูวนาธิเบศบรมบพิตรพระพุทธเจ้าอยู่หัว	Somdet Phra Chao Borommaracha สมเด็จพระเจ้าบรมราชา		1310 – 1344 (34 years)	Brother of Thammaracha Son-in-law of Suwannaracha. Pathomsuriyawong Dynasty (by marriage)	1313–1315 Xiān invasion of Champa. Son of Thammatrailok of Sukhothai-Si Satchanalai Originally of Aphaikhamini Dynasty concurrent with Uthong IV of Suphannaphum concurrent with Sam of Phripphri
29		Somdet Phra Ramathibodi I of Lavo and Ayutthaya สมเด็จพระรามาธิบดีที่ ๑ and Phra Chao Uthong V of Suphannaphum พระเจ้าอู่ทองที่ ๕	Worachetha Kuman วรเชษฐกุมาร		1344 – 1369 (25 years)	Son of Borommaracha After King Phraek Si Racha of the Lavapura seat passed, the throne passed through his daughter Son Sai, onto her son, the governor of Ayodhya: Phra Chao Uthong Founded a new Dynasty	Heir to Lavo, Succeded all Dvaravati polities: Phripphri, Lavo, Suphannaphum, and Ayothaya, cannonically the 27th king of Siam. Brother-in-law to Uthong IV of Suphannaphum Son of Borommaracha of Ayothaya. Grandnephew to Sam of Phripphri Brother-in-law to Pha Ngua of Suphannaphum. great-great-grandson of Uthong II of Lavo grandson of Thammatriloka of Sukhothai-Si Satchanalai
Governorship of Lavo merged with the Ayutthaya governorship when Uthong inherited Lavo Lavo merged into the Ayutthayan crown in 1388

The Ayutthaya Kingdom was a result of a unification between two states: the Kingdom of Suphannaphum (Suphanburi) and the Kingdom of Lavo. Though the Kingdom of Lavo was originally a Mon kingdom, the migration of the Tai peoples into the Chao Phraya basin replaced the original Mons, consequently becoming the governors of these regions. This resulted in the capital moving from Lavapura (Lopburi) and Suphannaphum (Suphanburi) to Ayodhya (Old Ayutthaya), a new capital.^[27] Later on, the Kingdom of Nakhon si Thammarat came under the influence of Ayutthaya after seceding from Sukhothai, and Sukhothai losing influence and coming under Ayutthayan influence.

This conflict would last long into the history of Ayutthaya Kingdom, where families from the four major regional kingdoms vie over the throne of the kingdom. These kingdoms are: Kingdom of Nakhon Si Thammarat, Kingdom of Sukhothai, Kingdom of Lavo, and Kingdom of Suphannaphum. The Kingdom of Sukhothai was integrated into the Kingdom of Ayutthaya along with its noble families.^[28]

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession
Uthong V inherits all Dvaravati polity: Phripphri, Suphannaphum, Ayothaya, and Lavo
1		Somdet Phra Ramathibodi I of Lavo and Ayutthaya สมเด็จพระรามาธิบดีที่ ๑ and Phra Chao Uthong V of Suphannaphum and Phripphri พระเจ้าอู่ทองที่ ๕	Worachetha Kuman วรเชษฐกุมาร	House Thammaracha	3 April 1314	4 March 1351[29]	1369 (18 years) (63 years old)		First King of Ayutthaya First King of Unified Lavo-Suphannaphum-Phripphri (Siam Confederation) Descendant of Phra Pathomsuriya Thephanarathai Suwannabophit Son-in-law of Uthong III of Suphannaphum Son of Boromracha of Lavo
2		Somdet Phra Ramesuan สมเด็จพระราเมศวร			1339	1369	1370 (less than one year) (abdicated)	1395 (56 years old)	Son of Ramathibodi I

As previously mentioned, the kingdom of Ayutthaya was the result of the unification between two federations: Lavo and Suphannaphum. The ruling dynasty of Lavo gave rise to the Uthong Dynasty, in which the Suphannaphum dynasty came from the Suphannaphum federation. This federation held significant influence within the kingdom leading them to take control of the throne in 1310.

Suphannaphum Governor Seat
Regnal name	Reign from	Reign until	Notes
Uthong I	1163	1205	Younger brother of Pra Poa Noome Thele Seri, King of Phip Phli
Uthong II	1205	Unknown	Son of Pra Poa Noome Thele Seri Potentially ruled from Ayodhya
Vacant	Unknown	Mid-13th-C.
Saenpom	Unknown (Mid to late 13th century)		Possible Khom Sabat Khlon Lamphong[30] Suphan Buri was a tributary state of the Sukhothai Kingdom (1283–1298)
Uthong III	Unknown	1335	Son of Saenpom Possible father or father-in-law of Pha Ngua
Uthong IV	1335	1351	Son of Uthong III
Pha Ngua	1351	1370	Foundation of the Ayutthaya Kingdom (1351) Later became King Borommarachathirat I
Sri Thephahurat	1370	1374	Younger brother or son of Borommarachathirat I Father or relative of Nakhon In Born into a Suphannaphum father and a Phra Ruang mother
Nakhon In	1374	1408	Also the crown prince of Xiānluó Later became King Intharachathirat
Ai Phaya	1408	1424	Son of Intharachathirat Older brother of Borommarachathirat II
Suphannaphum merged into the Ayutthayan crown

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession
3		Somdet Phra Borommarachathirat I สมเด็จพระบรมราชาธิราชที่ ๑	Khun Luang Pha Ngua ขุนหลวงพะงั่ว	House Pha Ngua	1310	1370	1388 (18 years) (78 years old)		Descendant of Suphannaphum Kingdom's Royals Son of Boromracha of Suphannaphum Son-in-law of Boromracha of Lavo Overthrew Ramesuan
4		Somdet Phra Chao Thong Lan สมเด็จพระเจ้าทองลัน			1374	1388 (7 days) (14 years old)			Son of Borommarachathirat I

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession
(2)		Somdet Phra Ramesuan สมเด็จพระราเมศวร		House Thammaracha	1339	1388	1395 (7 years) (56 years old)		Son of Ramathibodi I Overthrew Thong Lan
5		Somdet Phra Ramrachathirat สมเด็จพระรามราชาธิราช	Somdet Phraya Ram Chao สมเด็จพญารามเจ้า		1356	1395	1409 (14 years) (usurped)	?	Son of Ramesuan

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession	Viceroy
6		Somdet Phra Nakhon Intharachathirat สมเด็จพระนครอินทราชาธิราช	Chao Nakhon In เจ้านครอินทร์	House Nakhon In	1359	1409	1424 (15 years) (65 years old)		Son of Borommarachathirat I Grandson of Loe Thai Descendant of Phra Pathomsuriya Thephanarathai Suwannabophit Overthrew Ramrachathirat
7		Somdet Phra Borommarachathirat II สมเด็จพระบรมราชาธิราชที่ ๒	Chao Sam Phraya เจ้าสามพระยา		1386	1424	1448 (24 years) (62 years old)		Viceroy of Sukhothai Son of Nakhon Intharachathirat Grandson of Maha Thammaracha I Succession War, won by not participating	Ramesuan (son)
8		Somdet Phra Borommatrailokkanat สมเด็จพระบรมไตรโลกนาถ	Phra Ramesuan (II) พระราเมศวร (ที่๒)		1431	1448	1488 (40 years) (57 years old)		Viceroy of Sukhothai Son of Borommarachathirat II Grandson of Maha Thammaracha II	Chettha (son&brother)
9		Somdet Phra Borommarachathirat III สมเด็จพระบรมราชาธิราชที่ ๓	Phra Borommaracha พระบรมราชา		1462	1488	1491 (3 years) (29 years old)		Son of Borommatrailokkanat Great-Grandson of Maha Thammaracha II
10		Somdet Phra Ramathibodi II สมเด็จพระรามาธิบดีที่ ๒	Phra Chetthathirat พระเชษฐาธิราช	House Chettha	1473	1491	10 October 1529 (38 years) (56 years old)		Viceroy of Sukhothai Son of Borommatrailokkanat Great-Grandson of Maha Thammaracha II	Athittayawong (son)
11		Somdet Phra Borommarachathirat IV สมเด็จพระบรมราชาธิราชที่ ๔	Phra Athittayawong พระอาทิตยวงศ์		1488	10 October 1529	1533 (4 years) (45 years old)		Son of Ramathibodi II	Chairacha (brother)
12		Somdet Phra Ratsadathirat สมเด็จพระรัษฎาธิราช			1529	1533 (5 months) (4 years old)			Son of Borommarachathirat IV (under a regency)	Vacant
13		Somdet Phra Chairachathirat สมเด็จพระไชยราชาธิราช		House Chairacha	1499	1533	1546 (13 years) (47 years old)		Younger Brother of Borommarachathirat IV Overthrew Ratsadathirat
14		Somdet Phra Yotfa สมเด็จพระยอดฟ้า			1535	1546	1548 (2 years) (usurped)	10 June 1548 (13 years old)	Son of Chairachathirat
—		Khun Worawongsathirat ขุนวรวงศาธิราช	Bunsi บุญศรี	House Bunsi	1503	before 10 June 1548	11 November 1548 – 5 January 1549 (154 days) (45 years old)		Count of Ayutthaya Step-father of Yotfa Overthrew Yotfa	Chan (brother)
15		Somdet Phra Maha Chakkraphat สมเด็จพระมหาจักรพรรดิ	Phra Chao Chang Pheuak พระเจ้าช้างเผือก or Phra Thianracha พระเทียรราชา	House Thianracha	1509	1548	1564 (18 years)		Younger Brother of Borommarachathirat IV and Chairachathirat Overthrew Worawongsathirat Abdicated and Entered Monkhood (1564-1568)	Ramesuan (son)
						1568	1569 (1 year) (60 years old)		De facto second reign as co-king, installed by Mahinthrathirat	Mahin (son)
16		Somdet Phra Mahinthrathirat สมเด็จพระมหินทราธิราช			1539	1568	2 August 1569 (1 year) (deposed)	c. late 1569 (30 years old)	Son of Maha Chakkraphat and Suriyothai	Vacant
First Fall of Ayutthaya

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession	Viceroy
Vassal of the First Toungoo Empire (1569–1584)
17		Somdet Phra Sanphet I สมเด็จพระสรรเพชญ์ที่ ๑ (Name given by Bayinnaung - Toungoo Emperor ) or Somdet Phra Maha Thammarachathirat I สมเด็จพระมหาธรรมราชาธิราชที่ ๑	Khun Phirenthorathep ขุนพิเรนเทพ or Somdet Phra Maha Thammaracha V สมเด็จพระมหาธรรมราชาที่ ๕ (Name given by King Maha Chakkraphat)	House Maha Thammaracha	1517	1569	c. 30 June 1590 (21 years) (73 years old)		Marquess of Phitsanulok Descendant of the Phra Ruang Dynasty of Sukhothai Son-in-law of Maha Chakkraphat Installed by Bayinnaung of Toungoo Empire	Naresuan (son)
Independence from the First Toungoo Empire, 1584
18		Somdet Phra Sanphet II สมเด็จพระสรรเพชญ์ที่ ๒	Somdet Phra Naresuan the Great สมเด็จพระนเรศวรมหาราช	House Maha Thammaracha	1555/56	1 July 1590	25 April 1605 (15 years) (49 years old)		Son of Sanphet I	Ekathotsarot (brother)
19		Somdet Phra Sanphet III สมเด็จพระสรรเพชญ์ที่ ๓	Somdet Phra Ekathotsarot สมเด็จพระเอกาทศรถ	House Ekathotsarot	1557	25 April 1605	1610 (5 years) (53 years old)		Son of Sanphet I	Suthat (son)
20		Somdet Phra Sanphet IV สมเด็จพระสรรเพชญ์ที่ ๔	Somdet Phra Si Saowaphak สมเด็จพระศรีเสาวภาคย์		1585	1610	1611 (1 year, 2 months) (26 years old)		Son of Sanphet III	Vacant
21		Somdet Phra Borommaracha I สมเด็จพระบรมราชาที่ ๑	Somdet Phra Songtham สมเด็จพระเจ้าทรงธรรม	House Songtham	1590	1611	12 December 1628 (17 years) (38 years old)		Son of Sanphet III Next in line after the murder of Sanphet IV	Si Sorarak (son)
22		Somdet Phra Borommaracha II สมเด็จพระบรมราชาที่ ๒	Somdet Phra Chetthathirat (II) สมเด็จพระเชษฐาธิราช		c. 1613	12 December 1628	1628–1629 (1 year) (16 years old)		Son of Borommaracha I	Vacant
23		Somdet Phra Athittayawong สมเด็จพระอาทิตยวงศ์			1620	1629 (36 days) (usurped)		1637 (17 years old)	Son of Borommaracha I Overthrew Borommaracha II, helped by Sanphet V

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession	Viceroy
24		Somdet Phra Chao Sanphet V สมเด็จพระสรรเพชญ์ที่ ๕	Somdet Phra Chao Prasat Thong สมเด็จพระเจ้าปราสาททอง	House Prasat Thong	1599	1629[31][32]	August 1655 (26 years) (56 years old)		Defence Minister and Marquess of Ayutthaya Son-in-law of Borommaracha I unclear origins: maternal cousin of Borommaracha I or illegitimate son of Sanphet III Overthrew Athittayawong	Vacant
25		Somdet Phra Sanphet VI สมเด็จพระสรรเพชญ์ที่ ๖	Somdet Chao Fa Chai สมเด็จเจ้าฟ้าไชย		1630	August 1655	1656 (1 year) (26 years old)		Son of Sanphet V
26		Somdet Phra Sanphet VII สมเด็จพระสรรเพชญ์ที่ ๗	Somdet Phra Si Suthammaracha สมเด็จพระศรีสุธรรมราชาธ	House Suthammaracha	1600	August 1656	26 October 1656 (~2 months) (56 years old)		Brother of Sanphet V Overthrew Sanphet VI	Narai (nephew) 1656 (2m.17d.)
27		Somdet Phra Ramathibodi III สมเด็จพระรามาธิบดีที่ ๓	Somdet Phra Narai the Great สมเด็จพระนารายณ์มหาราช	House Narai	16 February 1632	26 October 1656	11 July 1688 (32 years) (56 years old)		Son of Sanphet V Overthrew Sanphet VII	Vacant

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession	Viceroy
28		Somdet Phra Phetracha สมเด็จพระเพทราชา	Somdet Phra Mahaburut สมเด็จพระมหาบุรุษ	House Phetracha	1632	11 July 1688	5 February 1703 (14 years) (71 years old)		Elephant Corps Minister and General Son-in-law, Brother-in-law of Ramathibodi III Overthrew Ramathibodi III	Sorasak (stepson)
29		Somdet Phra Sanphet VIII สมเด็จพระสรรเพชญ์ที่ ๘	Somdet Phra Suriyenthrathibodi สมเด็จพระเจ้าสุริเยนทราธิบดี or Phra Chao Seua พระเจ้าเสือ	House Narai	1661	5 February 1703	9 February 1709 (6 years) (48 years old)		Adoptive Son of Phetracha Son of Ramathibodi III	Phet (son)
30		Somdet Phra Sanphet IX สมเด็จพระสรรเพชญ์ที่ ๙	Phra Chao Thai Sa พระเจ้าท้ายสระ		1679	9 February 1709	13 January 1733 (23 years) (54 years old)		Son of Sanphet VIII	Phon (brother)
31		Somdet Phra Maha Thammarachathirat II สมเด็จพระมหา ธรรมราชาธิราชที่ ๒	Somdet Phra Chao Yu Hua Borommakot สมเด็จพระเจ้าอยู่หัวบรมโกศ	House Borommakot	c. 1681[33]	13 January 1733	26 April 1758 (26 years) (77 years old)		Son of Sanphet VIII Succession War, overthrew the heir apparent - Prince Aphai	Senaphithak (son)
										Phonphinit (son)
32		Somdet Phra Maha Thammarachathirat III สมเด็จพระมหา ธรรมราชาธิราชที่ ๓	Somdet Phra Chao Uthumphon สมเด็จพระเจ้าอุทุมพร		1733	1 May 1758	1758 (3 months)	1796 (~63 years old)	Son of Maha Thammarachathirat II	Vacant
						1760			De facto second reign as co-king, installed by Ayutthayan Nobles
						refused a third de facto reign, taken to Konbaung as hostage until death
33		Somdet Phra Borommaracha III สมเด็จพระบรมราชาที่ ๓	Somdet Phra Thinang Suriyat Amarin สมเด็จพระที่นั่งสุริยาศน์อมรินทร์ or Somdet Phra Chao Ekkathat สมเด็จพระเจ้าเอกทัศ		1718	1758	7 April 1767 (9 years)	17 April 1767 (49 years old)	Son of Maha Thammarachathirat II Overthrew Maha Thammarachathirat III
Second Fall of Ayutthaya

No.	Portrait	Regnal name	Personal name	House	Birth	Reign from	Reign until	Death	Succession	Viceroy
1		Somdet Phra Sanphet X สมเด็จพระสรรเพชญ์ที่ ๑๐ or Somdet Phra Borommaracha IV สมเด็จพระบรมราชาที่ ๔	Somdet Phra Chao Taksin the Great สมเด็จพระเจ้าตากสินมหาราช or 鄭昭 (Zhèng Zhāo / Dên Chao)	House Taksin	17 April 1734	28 December 1767	1 April 1782 (14 years) (deposed) [34][35][a]	7 April 1782 (47 years old) (executed)[b]	Marquess of Tak Son-in-law of Rama I Reunited Ayutthaya, refounding it as Thonburi	Inthraphithak (son)

No.	Portrait	Regnal name and Seal	Ceremonial name	House	Birth (Parents)	Accession (Coronation)	Reign until	Death	Succession	Viceroy
1		Somdet Phra Ramathibodi IV สมเด็จพระรามาธิบดีที่ ๔ (name originally taken) or Rama I พระรามที่ ๑ (รัชกาลที่ ๑) (retroactively given)	Phrabat Somdet Phra Paramoruracha Maha Chakri Boromanat Phra Phutthayotfa Chulalok the Great พระบาทสมเด็จพระปรโมรุราชามหาจักรีบรมนารถ พระพุทธยอดฟ้าจุฬาโลกมหาราช (posthumously by Rama III) or Somdet Chao Phraya Maha Kasatseuk สมเด็จเจ้าพระยามหากษัตริย์ศึก	House Ramathibodi	20 March 1737 4th child (2nd son) of Thongdi and Daoreung	6 April 1782 (1st: 10 June 1782, 2nd: 17 June 1785)	7 September 1809 (27 years, 154 days) (72 years old)		Prime Minister & Grand Duke of Thonburi Father-in-law of Borommaracha IV Descendant of Duke Kosa Pan, grandson of Sanphet III Overthrew Borommaracha IV	Maha Sura Singhanat (brother)
										Itsarasunthon (son)
2		Rama II พระรามที่ ๒ (รัชกาลที่ ๒) (retroactively given)	Phrabat Somdet Phra Boromratchapongchet Maha Itsarasunthon Phra Phutthaloetla Naphalai พระบาทสมเด็จพระบรมราชพงษเชษฐมเหศวรสุนทร พระพุทธเลิศหล้านภาลัย (posthumously by Rama III)		24 February 1767 4th child (2nd son) of Rama I and Queen Amarindra	7 September 1809 (17 September 1809)	21 July 1824 (14 years, 317 days) (57 years old)		Son of Rama I	Maha Senanurak (brother)
3		Rama III พระรามที่ ๓ (รัชกาลที่ ๓) (retroactively given)	Phrabat Somdet Phra Paramathiworaset Maha Chetsadabodin Phra Nangklao Chao Yu Hua พระบาทสมเด็จพระปรมาธิวรเสรฐมหาเจษฎาบดินทรฯ พระนั่งเกล้าเจ้าอยู่หัว (posthumously by Rama IV) or Phra Maha Chettha Chao พระมหาเจษฎาราชเจ้า		31 March 1788 3rd child (2nd son) of Rama II and 1st child of Consort Sri Sulalai	21 July 1824 (1 August 1824)	2 April 1851 (26 years, 255 days) (63 years old)		Minister of Trade and Foreign Affairs Son of Rama II Elected by the Council of Nobles	Sakdiphonlasep(uncle)
4		Rama IV พระรามที่ ๔ (รัชกาลที่ ๔) (retroactively given)	Phrabat Somdet Phra Poramenthra Ramathibodhi Srisindra Maha Mongkut Phra Chomklao Chao Yu Hua พระบาทสมเด็จพระปรเมนทรรามาธิบดีศรีสินทรมหามงกุฎ พระจอมเกล้าเจ้าอยู่หัว or Phra Sayam Thewa Maha Makut Witthaya the Great พระสยามเทวมหามกุฏวิทยมหาราช	House Mongkut	18 October 1804 44th child (22nd son) of Rama II and 2nd child of Queen Sri Suriyendra	2 April 1851 (15 May 1851)	1 October 1868 (17 years, 182 days) (63 years old)		Son of Rama II Half-brother of Rama III Elected by the Council of Nobles	Pinklao (brother)
5		Rama V พระรามที่ ๕ (รัชกาลที่ ๕) (retroactively given)	Phrabat Somdet Phra Poraminthra Maha Chulalongkorn Phra Chulachomklao Chao Yu Hua พระบาทสมเด็จพระปรมินทรมหาจุฬาลงกรณ์ฯ พระจุลจอมเกล้าเจ้าอยู่หัว or Phra Piya the Great พระปิยมหาราช (his full name is 979 characters long)		20 September 1853 9th child (5th son) of Rama IV and 1st child of Queen Debsirindra	1 October 1868 (1st: 11 November 1868, 2nd: 16 November 1873)	23 October 1910 (42 years, 22 days) (57 years old)		Son of Rama IV Elected by the Council of Nobles (Regency until 1873)	Wichaichan (cousin)
										Viceroyalty abolished in 1885 after the Front Palace Crisis
6		Rama VI พระรามที่ ๖ (รัชกาลที่ ๖) (new regnal name)	Phrabat Somdet Phra Poramenthra Maha Vajiravudh Phra Mongkutklao Chao Yu Hua พระบาทสมเด็จพระปรเมนทรมหาวชิราวุธ พระมงกุฎเกล้าเจ้าอยู่หัว or Phrabat Somdet Phra Ramathibodi Sisinthara Maha Vajiravudh Phra Mongkutklao Chao Yu Hua พระบาทสมเด็จพระรามาธิบดีศรีสินทรมหาวชิราวุธ พระมงกุฎเกล้าเจ้าอยู่หัว (name to be used during his lifetime) or Phra Maha Thirarat Chao พระมหาธีรราชเจ้า		1 January 1881 28th child (11th son) of Rama V and 2nd child of Queen Saovabha Phongsri	23 October 1910 (1st: 11 November 1910, 2nd: 28 November 1911)	26 November 1925 (15 years, 34 days) (44 years old)		Prince of Ayutthaya Sri Dvaravati Son of Rama V Crown Prince
7		Rama VII พระรามที่ ๗ (รัชกาลที่ ๗)	Phrabat Somdet Phra Poramenthra Maha Prajadhipok Phra Pokklao Chao Yu Hua พระบาทสมเด็จพระปรมินทรมหาประชาธิปก พระปกเกล้าเจ้าอยู่หัว		8 November 1893 27th child (31st son) of Rama V and 9th child of Queen Saovabha Phongsri	26 November 1925 (25 February 1926)	2 March 1935 (9 years, 96 days) (abdicated)	30 May 1941 (47 years old)	Prince of Sukhothai Son of Rama V Brother of Rama VI 1924 Palace Law of Succession
8		Rama VIII พระรามที่ ๘ (รัชกาลที่ ๘)	Phrabat Somdet Phra Poramenthra Maha Ananda Mahidol Phra Atthamaramathibodin พระบาทสมเด็จพระปรเมนทรมหาอานันทมหิดล พระอัฐมรามาธิบดินทร	House Mahidol	20 September 1925 2nd child (1st son) of Mahidol Adulyadej and Princess Srinagarindra	2 March 1935 (13 August 1946; posthumous)[37]	9 June 1946 (11 years, 99 days) (20 years old)		Grandson of Rama V Nephew of Rama VI and Rama VII 1924 Palace Law of Succession Elected by the Cabinet
9		Rama IX พระรามที่ ๙ (รัชกาลที่ ๙)	Phrabat Somdet Phra Poraminthra Maha Bhumibol Adulyadej the Great Mahitalathibet Ramathibodi Chakri Naribodin Sayamintharathirat Boromanatbophit พระบาทสมเด็จพระปรมินทรมหาภูมิพลอดุลยเดช มหาราช มหิตลาธิเบศรรามาธิบดี จักรีนฤบดินทร สยามินทราธิราช บรมนาถบพิตร or Phra Phatthara the Great พระภัทรมหาราช		5 December 1927 3rd child (2nd son) of Mahidol Adulyadej and Princess Srinagarindra	9 June 1946 (5 May 1950)	13 October 2016 (70 years, 126 days) (88 years old)		Grandson of Rama V Brother of Rama VIII 1924 Palace Law of Succession Longest-reigning Thai monarch
10		Rama X พระรามที่ ๑๐ (รัชกาลที่ ๑๐)	Phrabat Somdet Phra Poramenthra Ramathibodi Sisinthara Maha Vajiralongkorn Phra Wachiraklao Chao Yu Hua พระบาทสมเด็จพระปรเมนทรรามาธิบดีศรีสินทรมหาวชิราลงกรณ พระวชิรเกล้าเจ้าอยู่หัว		28 July 1952 2nd child (only son) of Rama IX and Queen Sirikit	13 October 2016 (4 May 2019)[38]	Incumbent (9 years, 163 days) (73 years old)		Son of Rama IX Crown Prince

• Family tree of Thai monarchs
• Monarchy of Thailand
• List of rulers of Lan Na
• List of Thai royal consorts
• Rama (Kings of Thailand)
• Chakri dynasty
• Regent of Thailand
• Thailand

• Prince Chula Chakrabongse, HRH (1967). Lords of Life: A History of the Kings of Thailand. United Kingdom: Alvin Redman Limited.
• Prince Damrong Rajanubhab, Disuankumaan (2001). Our Wars With The Burmese: Thai-Burmese Conflict 1539-1767. Thailand: White Lotus Co. Ltd. ISBN 974-7534-58-4.
• Princess Maha Chakri Sirindhorn Foundation (2011). Directory of Thai kings (Thai: นามานุกรมพระมหากษัตริย์ไทย) (PDF). Thailand: www.nanmeebooks.com. ISBN 978-616-7308-25-8. Archived from the original (PDF) on 4 March 2012. Retrieved 8 January 2012.
• Royal Institute of Thailand (2002). "Chronology of the Kings of Ayutthaya". Archived from the original on 3 December 2013. Retrieved 8 January 2012.
• Wood, William A. R. (1924). History of Siam. Thailand: Chalermit Press. ISBN 1-931541-10-8. {{cite book}}: ISBN / Date incompatibility (help)