List of monarchs of Thailand

The Royal Standard of the King of Thailand. The Garuda in the middle has been the symbol of the monarchy since the times of Ayutthaya.

Kingdom of Sukhothai

Phra Ruang dynasty (1238–1368, 1368–1438)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Pho Khun Sri Indraditya
(Pho Khun Bang Klang Hao)
1188 1238 1279 (41 years)   First King of Sukhothai
Pho Khun Ban Mueang ? 1279 (1 year)   Son of Sri Indraditya
Pho Khun Ram Khamhaeng the Great
(Pho Khun Ram Racha)
c. 1237-1247 1279 1298 (19 years)   Younger brother of Ban Muang
  Son of Sri Indraditya
Phaya Loethai ? 1298 1323 (25 years)   Son of Ram Khamhaeng
Phaya Nguanamthom ? 1323 1347 (24 years)   Cousin of Lerthai
  Son of Ban Muang
Phaya Lithai
(Phra Maha Thammaracha I)
? 1347 1368 (21 years)   Cousin of Nguanamthom
  Son of Lerthai
Under the suzerainty of the Kingdom of Ayutthaya
Phaya Lue Thai
(Phra Maha Thammaracha II)
? 1368 1399 (31 years)   Son of Lithai
Phaya Saileuthai
(Phra Maha Thammaracha III)
? 1400 1419 (19 years)   Son of Leuthai
Phaya Borommapan
(Phra Maha Thammaracha IV)
? 1419 1438 (19 years)   Son of Saileuthai

Kingdom of Ayutthaya

1st Uthong dynasty (1350–1370)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Somdet Phra Chao Uthong
(Somdet Phra Ramathibodi I)
1314 1350 1369 (20 years)   First King of Ayutthaya
Somdet Phra Ramesuan (First Reign) 1339 1369 1370 (less than one year)
(abdicated)
1395   Son of Uthong

1st Suphannaphum dynasty (1370–1388)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Somdet Phra Borommarachathirat I
(Khun Luang Pha Ngua)
? 1370 1388 (18 years)   Husband of Uthong's older sister
  Usurper
  Former Lord of Suphanburi
Somdet Phra Chao Thong Lan
(Chao Thong Chan)
? 1388 (7 days)
(usurped)
  Son of Borommarachathirat I

2nd Uthong dynasty (1388–1409)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Somdet Phra Ramesuan (Second Reign) 1339 1388 1395 (7 years)   Former King reclaiming the throne
  Son of Uthong
Somdet Phra Rama Ratchathirat 1356 1395 1409 (14 years)
(usurped)
?   Son of Ramesuan

2nd Suphannaphum dynasty (1409–1569)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Somdet Phra Intha Racha I
(Phra Chao Nakhon In)
1359 1409 1424 (15 years)   Nephew of Borommarachathirat I
  Former Lord of Suphanburi, offered crown
Somdet Phra Borommarachathirat II
(Chao Sam Phraya)
? 1424 1448 (24 years)   Son of Intha Racha I
Somdet Phra Boromma Trailokanat 1431 1448 1488 (40 years)   Son of Borommarachathirat II
Somdet Phra Borommarachathirat III
(Intha Racha II)
? 1488 1491 (3 years)   Son of Trailokanat
Somdet Phra Ramathibodi II
(Phra Chetthathirat I)
1473 1491 1529 (38 years)   Younger brother of Borommarachathirat III
  Son of Trailokanat
Somdet Phra Borommarachathirat IV
(Somdet Phra Borommaracha Nor Buddhankoon)
(Phra Athitawongse)
? 1529 1533 (4 years)   Son of Ramathibodi II
Phra Ratsadathirat 1529 1533 (4 months)
(usurped)
  Son of Borommarachathirat IV
  Child King, reign under regency
Somdet Phra Chairacha
(Somdet Phra Chairacha Thirat)
(Phra Chai)
? 1533 1546 (13 years)   Uncle of Ratsadathirat
  Son of Ramathibodi II
  Usurper
Phra Yodfa
(Phra Keowfa)
1535 1546 1548 (2 years)   Son of Chairacha
Khun Worawongsathirat
(Khun Chinnarat)
(Bun Si)
? 11 November 1548 (42 days)
(Removed)
  Usurper monarch, not accepted by some historians
Somdet Phra Maha Chakkraphat
(Phra Chao Chang Pueak)
1509 1548 1564 (16 years)   Son of Ramathibodi II
  Younger brother of Borommarachathirat IV and Chairacha
  Seized the throne from usurper
  Became a monk at Pegu (1564–1568)
Vassal of Burma (1564–1568)
Somdet Phra Mahinthrathirat 1539 1564 1569 (4 years as vassal king,
1 year as king)
  Son of Maha Chakkrapat and Queen Suriyothai
Vassal of Burma (1569–1584)

Sukhothai dynasty (1569–1629)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Somdet Phra Maha Thammarachathirat
(Somdet Phra Sanphet I)
1517 1569 29 July 1590 (21 years)   Former Lord of Phitsanulok
  Installed as vassal of Bayinnaung of Burma, declared independence in 1584
Somdet Phra Naresuan the Great
(Somdet Phra Sanphet II)
(Phra Naret)
25 April 1555 29 July 1590 7 April 1605 (15 years)   Son of Maha Thammarachathirat
Somdet Phra Ekathotsarot
(Somdet Phra Sanphet III)
1557 25 April 1605 1620 (15 years)   Brother of Naresuan
  Son of Maha Thammarachathirat
Somdet Phra Si Saowaphak
(Somdet Phra Sanphet IV)
? 1620 (less than a year, murdered)   Son of Ekathotsarot
Somdet Phra Songtham
(Somdet Phra Borommaracha I)
1590 1620 12 December 1628 (8 years)   Son of "Ekathotsarot", invited to take the throne after leaving the Sangha
Somdet Phra Chetthathirat II
(Somdet Phra Borommaracha II)
c. 1613 1628 1628–1629 (1 year and 7 months)
(assassinated)
  Son of Songtham
Phra Athittayawong 1618 1629 (36 days)
(usurped)
  Younger brother of Chetthathirat II
  Son of Songtham

Prasat Thong dynasty (1630–1688)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Somdet Phra Chao Prasat Thong
(Somdet Phra Sanphet V)
1599 1629 1656 (27 years)   Usurper, formerly the Kalahom
  Rumored to be a son of Ekathotsarot
Somdet Chao Fa Chai
(Somdet Phra Sanphet VI)
? 1656 (9 months)
(usurped)
  Son of Prasat Thong
Somdet Phra Si Suthammaracha
(Somdet Phra Sanphet VII)
? June 1656 26 October 1656 (2 months 17 Days)
(usurped)
  Usurper, Uncle of Chao Fa Chai
  Younger brother of Prasat Thong
Somdet Phra Narai the Great
(Somdet Phra Ramathibodi III)
16 February 1633 26 October 1656 11 July 1688 (32 years)   Usurper, nephew of Si Suthammaracha
  Son of Prasat Thong
  Half-brother of Chao Fa Chai

Ban Phlu Luang dynasty (1688–1767)

Portrait Name Birth Reign from Reign until Death Relationship with predecessor(s)
Somdet Phra Phetracha 1632 1688 1703 (15 years)   Usurper, cousin of Narai
  Former commander of the Royal Elephant Corps
Somdet Phra Suriyenthrathibodi
(Somdet Phra Sanphet VIII)
(Phra Chao Suea)
? 1703 1709 (7 years)   Rumored to be a son of Narai
Somdet Phra Chao Yu Hua Thai Sa
(Somdet Phra Sanphet IX)
? 1709 1733 (24 years)   Son of Suriyenthrathibodi
Somdet Phra Chao Yu Hua Boromakot 1680 1733 1758 (26 years)   Brother of Thai Sa, Former Front Palace
  Son of Suriyenthrathibodi
Somdet Phra Chao Uthumphon
(Somdet Phra Ramathibodi IV)
(Khun Luang Hawat)
? 1758 (2 months)
(usurped)
1796   Son of Boromakot
Somdet Phra Chao Ekkathat
(Somdet Phra Chao Yu Hua Phra Thinang Suriyat Amarin)
(Somdet Phra Borommaracha III)
? 1758 7 April 1767 (9 years)
(removed)
17 April 1767   Brother of Uthumphon
  Usurper, Former Front Palace
  Son of Boromakot
Second Fall of Ayutthaya

Kingdom of Thonburi

Thonburi dynasty (1768–1782)

Portrait Name Birth Reign from Coronation Reign until Death Relationship with predecessor(s)
Somdet Phra Chao Taksin the Great
(Phra Chao Krung Thonburi)
(Somdet Phra Borommaracha IV)
17 April 1734 6 November 1767 28 December 1768 6 April 1782
(14 years)
(removed)
7 April 1782
(47 years old)
(executed)
  Only King of Thonburi

Kingdom of Rattanakosin, Siam (Thailand)

Chakri dynasty (1782–present)

Portrait Name Birth Reign from Coronation Reign until Death Relationship with predecessor(s)
Phrabat Somdet Phra Buddha Yodfa Chulaloke
the Great
(Rama I)
20 March 1737 6 April 1782 10 June 1782 7 September 1809
(27 years)
(72 years old)
  First King of Rattanakosin
Phrabat Somdet Phra Buddha Loetla Nabhalai
(Rama II)
24 February 1767 7 September 1809 21 July 1824
(14 years)
(57 years old)
  Son of Rama I and Queen Amarindra
Phrabat Somdet Phra Paramintharamaha
Jessadabodindra
Phra Nang Klao Chao Yu Hua
(Rama III)
(Phra Maha Chetsadarat Chao)
31 March 1788 21 July 1824 2 April 1851
(26 years)
(63 years old)
  Son of Rama II and Princess Consort Sri Sulalai
Phrabat Somdet Phra Paramentharamaha
Mongkut
Phra Chom Klao Chao Yu Hua
(Rama IV)
18 October 1804 2 April 1851 6 April 1851 1 October 1868
(17 years)
(63 years old)
  Half-brother of Rama III
  Son of Rama II and Queen Sri Suriyendra
Phrabat Somdet Phra Paramintharamaha
Chulalongkorn
the Great
Phra Chunla Chom Klao Chao Yu Hua
(Rama V)
(Phra Piya Maharat)
20 September 1853 1 October 1868 11 November 1868
(1st time)
16 November 1873
(2nd time)
23 October 1910
(42 years)
(57 years old)
  Son of Rama IV and Queen Debsirindra
  Under Regency of Si Suriyawongse from 1868–1873
Phrabat Somdet Phra Paramentharamaha
Vajiravudh
Phra Mongkut Klao Chao Yu Hua
(Rama VI)
(Phra Maha Thirarachachao)
1 January 1881 23 October 1910 11 November 1911 25 November 1925
(15 years)
(44 years old)
  Son of Rama V and Queen Saovabha Bongsri
Phrabat Somdet Phra Paramintharamaha
Prajadhipok
Phra Pok Klao Chao Yu Hua
(Rama VII)
8 November 1893 25 November 1925 25 February 1926 2 March 1935
(9 years)
(abdicated)
30 May 1941
(47 years old)
  Younger brother of Rama VI
  Son of Rama V and Queen Saovabha Bongsri
Phrabat Somdet Phra Paramentharamaha
Ananda Mahidol
Phra Atthama Ramathibodin
(Rama VIII)
20 September 1925 2 March 1935 9 June 1946
(11 years)
(20 years old)
  Nephew of Rama VII
  Grandson of Rama V by Mahidol Adulyadej
  Under Regency from 1935–1946
Phrabat Somdet Phra Paramintharamaha
Bhumibol Adulyadej
the Great
(Rama IX)
(Somdet Phra Phatthara Maharat)
5 December 1927 9 June 1946 5 May 1950 Present
(69 years)
(88 years old)
  Younger brother of Rama VIII
  Grandson of Rama V by Mahidol Adulyadej

See also

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Bibliography

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