List of Thai monarchs

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

This article lists the monarchs of Thailand from the foundation of the Sukhothai Kingdom in 1238 until the present day.

Sukhothai Kingdom (1238–1368)[edit]

Phra Ruang dynasty (1238–1368; under Ayutthaya 1368–1438)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
1 พ่อขุนศรีอินทราทิตย์.jpg Pho Khun Si Inthrathit
(Pho Khun Bang Klang Hao)
1188 1238 1270 (32 years) (82 years old)  • First Pho Khun (Lord) of Thailand
 • First ruler of Sukhothai
2 Phra Ruang.jpg Pho Khun Ban Mueang c. 1237 1270 1279 (9 years) (42 years old)  • Son of Si Inthrathit
3 Ramkhamhaeng the Great.jpg Pho Khun Ram Khamhaeng the Great
(Pho Khun Ramarat)
c. 1237/1247 1279 1298 (19 years) (51/61 years old)  • Younger brother of Ban Mueang
 • First ruler of Thailand with the title of Maharat (the Great)
4 No picture Thai monarchs.svg Phaya Loe Thai c. 1262 1298 1323 (25 years) (61 years old)  • Son of Ram Khamhaeng the Great
 • First Phaya (Governor) of Thailand
5 No picture Thai monarchs.svg Phaya Ngua Nam Thum c. 1266 1323 1347 (24 years) (81 years old)  • Cousin of Loe Thai
6 Mahathammaracha I.JPG Phaya Li Thai
(Phra Maha Thammaracha I)
c. 1300 1347 1368 (21 years) (68 years old)  • Cousin of Ngua Nam Thum
 • First Phra (King) of Thailand
Under the suzerainty of the Kingdom of Ayutthaya
7 No picture Thai monarchs.svg Phaya Lue Thai
(Phra Maha Thammaracha II)
c. 1358 1368 1399 (31 years)

(41 years old)

 • Son of Li Thai
8 No picture Thai monarchs.svg Phaya Saileuthai
(Phra Mahathammaracha III)
c. 1380 1400 1419 (19 years) (39 years old)  • Son of Luethai
9 No picture Thai monarchs.svg Phaya Borommapan
(Phra Mahathammaracha IV)
c. 1401 1419 1438 (19 years) (37 years old)  • Son of Sailuethai
The end of autonomy, unification under the Ayutthaya Kingdom.

Ayutthaya Kingdom (1351–1767)[edit]

1st Uthong dynasty (1351–1370)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
1 Phrajaouthong06.jpg Somdet Phra Chao Uthong
(Somdet Phra Ramathibodi I)
3 April 1314 4 March 1351[1] 1369 (18 years)

(63 years old)

 • First King of Ayutthaya
2 No picture Thai monarchs.svg Somdet Phra Ramesuan 1339 1369 1370 (less than one year)
(abdicated)
1395

(56 years old)

 • Son of Uthong

1st Suphannaphum dynasty (1370–1388)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
3 No picture Thai monarchs.svg Somdet Phra Borommarachathirat I
(Khun Luang Pha Ngua)
1310 1370 1388 (18 years)

(78 years old)

 • Husband of Uthong's older sister
 • Usurper
 • Former Lord of Suphanburi
4 No picture Thai monarchs.svg Somdet Phra Chao Thong Lan
(Chao Thong Chan)
1374 1388 (7 days)

(14 years old)

 • Son of Borommarachathirat I

2nd Uthong dynasty (1388–1409)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
(2) No picture Thai monarchs.svg Somdet Phra Ramesuan 1339 1388 1395 (7 years)

(56 years old)

 • Former King reclaiming the throne
 • Son of Uthong
5 No picture Thai monarchs.svg Somdet Phra Ramrachathirat 1356 1395 1409 (14 years)
(usurped)
?  • Son of Ramesuan

2nd Suphannaphum dynasty (1409–1569)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
6 No picture Thai monarchs.svg Somdet Phra Intharacha I
(Phra Chao Nakhon In)
1359 1409 1424 (15 years)

(65 years old)

 • Son of Borommarachathirat I
 • Former Lord of Suphanburi, offered crown
7 No picture Thai monarchs.svg Somdet Phra Borommarachathirat II
(Somdet Phra Chao Sam Phraya)
1386 1424 1448 (24 years)

(62 years old)

 • Son of Inthracha I
Administrative Reform Chatusadom, 1463
8 No picture Thai monarchs.svg Somdet Phra Borommatrailokkanat (Ramesuan II) 1431 1448 1488 (40 years)

(57 years old)

 • Son of Borommarachathirat II
9 No picture Thai monarchs.svg Somdet Phra Borommarachathirat III
(Intharacha II)
1462 1488 1491 (3 years)

(29 years old)

 • Son of Borommatrailokkanat
10 No picture Thai monarchs.svg Somdet Phra Ramathibodi II
(Chettathirat I)
1473 1491 10 October 1529 (38 years)

(56 years old)

 • Younger brother of Borommarachathirat III
 • Son of Borommatrailokkanat
11 No picture Thai monarchs.svg Somdet Phra Borommarachathirat IV
(Borommarachathirat No Phutthangkun)
(Phra Buddhakura)
1488 10 October 1529 1533 (4 years)

(45 years old)

 • Son of Ramathibodi II
12 No picture Thai monarchs.svg Phra Ratsadathirat 1529 1533 (5 months)

(4 years old)

 • Son of Borommarachathirat IV
 • Child King, reign under regency
13 No picture Thai monarchs.svg Somdet Phra Chairacha
(Chairachathirat)
(Phra Chai)
1499 1533 1546 (13 years)

(47 years old)

 • Uncle of Ratsadathirat
 • Son of Ramathibodi II
 • Usurper
14 No picture Thai monarchs.svg Phra Yotfa
(Phra Kaeofa)
1535 1546 1548 (2 years) 10 June 1548

(13 years old)

 • Son of Chairacha
- No picture Thai monarchs.svg Khun Worawongsathirat
(Khun Chinnarat)
(Bun Si)
1503 before 10 June 1548 11 November 1548 - 5 January 1549

(45 years old)

 • Usurper monarch, not accepted by some historians
15 No picture Thai monarchs.svg Somdet Phra Maha Chakkraphat
(Phra Chao Chang Phueak)
(Phra Thianracha)
1509 1549 18 February 1564 (15 years)
(usurped)
15 April 1569

(60 years old)

 • Son of Ramathibodi II
 • Younger brother of Borommarachathirat IV and Chairacha
 • Seized the throne from usurper
 • Became a Buddhist monk at Pegu (1564–1568)
Vassal of Burma (1564–1568)
16 No picture Thai monarchs.svg Somdet Phra Mahinthrathirat 1539 18 February 1564 before 12 May 1568 (~4 years) c. late 1569  • Son of Maha Chakkraphat and Queen Suriyothai
(15) No picture Thai monarchs.svg Somdet Phra Maha Chakkraphat
(Phra Chao Chang Phueak)
(Phra Thianracha)
1509 before 12 May 1568 15 April 1569 (~1 year)  • Father of Mahinthrathirat
 • Regained the throne of Ayutthaya at the urging of his son
 • Died during the Second Siege of Ayutthaya
(16) No picture Thai monarchs.svg Somdet Phra Mahinthrathirat 1539 15 April 1569 2 August 1569 (3 months)
(usurped)
c. late 1569  • Son of Maha Chakkraphat
 • Temporarily regained the throne following Maha Chakkraphat's death
First Fall of Ayutthaya

Sukhothai dynasty (1569–1629)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
Vassal of Burma (1569–1584)
17 No picture Thai monarchs.svg Somdet Phra Maha Thammarachathirat
(Sanphet I)
1517 1569 c. 30 June 1590 (21 years)

(73 years old)

 • Former Lord of Phitsanulok
 • Son-in-law of Maha Chakkraphat and Queen Suriyothai
 • Installed as vassal of Bayinnaung of Burma, declared independence in 1584
to restore independence, break free under the rule of the First Toungoo Empire, 1592
18 KingNU.jpg Somdet Phra Naresuan the Great
(Sanphet II)
(Phra Naret)
1555/56 1 July 1590 25 April 1605 (15 years)

(49 years old)

 • Son of Maha Thammarachathirat I
19 Ekatotsarotwpamok06.jpg Somdet Phra Ekathotsarot
(Sanphet III)
1557 25 April 1605 1610 (5 years)

(53 years old)

 • Brother of Naresuan
 • Son of Maha Thammarachathirat I
20 No picture Thai monarchs.svg Somdet Phra Si Saowaphak
(Sanphet IV)
1585 1610 1611 (1 year, 2 months)

(26 years old)

 • Son of Ekathotsarot
21 King Songtham.jpg Somdet Phra Songtham
(Borommaracha I)
(Intharacha III)
1590 1611 12 December 1628 (17 years)

(38 years old)

 • Son of "Ekathotsarot", invited to take the throne after leaving the Sangha
22 No picture Thai monarchs.svg Somdet Phra Chetthathirat
(Borommaracha II)
(Phra Otsa)
c. 1613 12 December 1628 1628–1629 (1 year)

(16 years old)

 • Son of Songtham
23 No picture Thai monarchs.svg Phra Athittayawong 1620 1629 (36 days)
(usurped)
1637

(17 years old)

 • Younger brother of Chetthathirat II
 • Son of Songtham

Prasat Thong dynasty (1629–1688)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
24 Portrait of King Prasat Thong.jpeg Somdet Phra Chao Prasat Thong
(Sanphet V)
1599 1629[2][3] August 1656 (27 years)

(57 years old)

 • Usurper, formerly the Kalahom
 • Rumored to be a son of Ekathotsarot
25 No picture Thai monarchs.svg Somdet Chao Fa Chai
(Sanphet VI)
1630 August–September 1656 (1 month)

(26 years old)

 • Son of Prasat Thong
26 No picture Thai monarchs.svg Somdet Phra Si Suthammaracha
(Sanphet VII)
1600 September 1656 26 October 1656 (1 months)

(56 years old)

 • Usurper, Uncle of Chao Fa Chai
 • Younger brother of Prasat Thong
27 Narai.JPG Somdet Phra Narai the Great
(Ramathibodi III)
16 February 1632 26 October 1656 11 July 1688 (32 years)

(56 years old)

 • Usurper, nephew of Si Suthammaracha
 • Son of Prasat Thong
 • Half-brother of Chao Fa Chai
 • Former Front Palace
The Siamese revolution of 1688; populist[4] upheaval

Ban Phlu Luang dynasty (1688–1767)[edit]

No. Portrait Name Birth Reign from Reign until Death Notes
28 PITERA TJAY Rex Siam by Gaspar Bouttat 1690.jpg Somdet Phra Phetracha
(Ramesuan III)
1632 11 July 1688 5 February 1703 (14 years)

(71 years old)


 • Former commander of the Royal Elephant Corps
29 พระบรมรูป สมเด็จพระเจ้าเสือ วัดไทร.jpg Somdet Phra Suriyenthrathibodi
(Sanphet VIII)
(Phra Chao Sua)
1661 5 February 1703 9 February 1709 (7 years)

(48 years old)

 • Adoptive son of Phetracha
 • Son of Narai and Chiang Mai's Princess that was given to be Phetracha's wife later.
30 No picture Thai monarchs.svg Somdet Phra Chao Yu Hua Thai Sa
(Sanphet IX)
(Puhmintharacha)
1679 9 February 1709 13 January 1733 (23 years)

(54 years old)

 • Son of Suriyenthrathibodi
31 No picture Thai monarchs.svg Somdet Phra Chao Yu Hua Borommakot
(Maha Thammarachathirat II)
c. 1681[5] 13 January 1733 26 April 1758 (26 years)

(77 years old)

 • Brother of Thai Sa, Former Front Palace
 • Son of Suriyenthrathibodi
32 Burmese Depiction of an Ayutthaya King.jpg Somdet Phra Chao Uthumphon[a]
(Maha Thammarachathirat III)
(Khun Luang Ha Wat)
1733 1 May 1758 1758 (3 months)

(25 years old)

1796

(~63 years old)

 • Son of Borommakot
 • Former Front Palace
33 Burmese Depiction of an Ayutthaya King.jpg Somdet Phra Chao Ekkathat[a]
(Phra Thinang Suriyat Amarin)
(Borommaracha III)
1718 1758 7 April 1767 (9 years)
(deposed)
17 April 1767

(49 years old)

 • Usurper, brother of Uthumphon
 • Son of Borommakot
Second Fall of Ayutthaya

Thonburi Kingdom (1767–1782)[edit]

Thonburi dynasty (1767–1782)[edit]

No. Portrait Name Birth Reign from Coronation Reign until Death Notes
1 Monument of King Taksin in Wat Kungtapao.jpg Taksin the Great
(Phra Chao Krung Thonburi)
(Emperor of Siam)[6]
(Sanphet X)
17 April 1734 28 December 1767 March 1782
(14 years)
(deposed)
[7][b]
7 April 1782
(47 years old)
(executed)
[c]
 • Only King of Thonburi
 • Son of a Teochew Chinese family named "Tea" (鄭) or "Zheng" in Mandarin Chinese
The coup seized power as part of the Rattanakosin Empire.[9]

Rattanakosin Kingdom (1782–present)[edit]

Chakri dynasty (1782–present)[edit]

No. Portrait Name Birth Reign from Coronation Reign until Death Notes
1 Buddha Yodfa Chulaloke portrait.jpg Phrabat Somdet Phra Paramoruracha
Maha Chakri Boromanat
Phra Phutthayotfa Chulalok
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
 • Friend and Father-in-law of Taksin
 • Usurper
 • Son of Thongdee (Mon nobleman that was a descendant of Kosa Pan) and Yok (Daughter of a Hokkien Chinese millionaire family)
2 Buddha Loetla Nabhalai portrait.jpg Phrabat Somdet Phra Boromratchapongchet
Mahetsawarasunthon
Phra Phutthaloetla Naphalai
(Rama II)
24 February 1767 7 September 1809 21 July 1824
(14 years)
(57 years old)
 • Son of Rama I and Queen Amarindra
3 Nangklao portrait.jpg Phrabat Somdet Phra Paramathiworaset
Maha Jessadabodindra
Phra Nang Klao Chao Yu Hua
(Rama III)
(Phra Maha Jesataraj Chao)
31 March 1788 21 July 1824 2 April 1851
(26 years)
(63 years old)
 • Son of Rama II and Princess Consort Sri Sulalai
4
Rama4 portrait (cropped).jpg
Phrabat Somdet Phra Paramenthra
Ramathibodhi Srisindra
Maha Mongkut
Phra Chom Klao Chao Yu Hua
(Rama IV)
Phra Syamadevamahamakut Vidyamaharaj[10]
18 October 1804 2 April 1851 6 April 1851
(1st time)
15 May 1851
(2nd time)
1 October 1868
(17 years)
(63 years old)
 • Half-brother of Rama III
 • Son of Rama II and Queen Sri Suriyendra
The Feudal system changed the regime to Absolute monarchy, 1892
5
King Chulalongkorn.jpg
Phrabat Somdet Phra Paraminthra
Maha Chulalongkorn
Phra Chulachomklao Chao Yu Hua
the Great
(Rama V)
(Phra Piya Maharaj)
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 Grand Duke Sri Suriyavongs from 1868–1873
6
King Vajiravudh.jpg
Phrabat Somdet Phra Paramenthra
Maha Vajiravudh
Phra Mongkut Klao Chao Yu Hua
(Rama VI)
(Phra Maha Dhiraraj Chao)
1 January 1881 23 October 1910 11 November 1911 26 November 1925
(15 years)
(44 years old)
 • Son of Rama V and Queen Saovabha Phongsri
7
Prajadhipok portrait.jpg
Phrabat Somdet Phra Paraminthra
Maha Prajadhipok
Phra Pok Klao Chao Yu Hua
(Rama VII)
8 November 1893 26 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 Phongsri
The Siamese revolution of 1932 ended Absolute monarchy
8
King Ananda Mahidol portrait photograph.jpg
Phrabat Somdet Phra Paramenthra
Maha 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
9
Portrait painting of King Bhumibol Adulyadej.jpg
Phrabat Somdet Phra
Boromchanakathibet
Maha Bhumibol Adulyadej Maharaj
Borommanatbophit

the Great
(Rama IX)
(Somdet Phra Phatthara Maharat,
Somdet Phra Maha Bhumibol Adulyadej Maharat)

5 December 1927 9 June 1946 5 May 1950 13 October 2016
(70 years 126 days)
(88 years old)
 • Younger brother of Rama VIII
 • Grandson of Rama V by Mahidol Adulyadej
10
Portrait of King Rama X.jpg
Phrabat Somdet Phra Paramenthra
Ramathibodhi Srisindra
Maha Vajiralongkorn
Phra Vajira Klao Chao Yu Hua
(Rama X)
28 July 1952 13 October 2016 4 May 2019[11] Present
(Incumbent: 6 years, 54 days)
(70 years old)
 • Only son of Rama IX and Queen Sirikit
 • 2nd child of Rama IX

Timeline of monarchs[edit]

VajiralongkornBhumibol AdulyadejAnanda MahidolPrajadhipokVajiravudhChulalongkornMongkutRama IIIRama II of SiamRama ITaksinEkkathatUthumphonBoromakotThai SaSuriyenthrathibodiPhetrachaNaraiSi SuthammarachaChao Fa ChaiPrasat ThongAthittayawongChetthathiratSongthamSi SaowaphakEkathotsarotNaresuanMahathammarachathiratMahinthrathiratMaha ChakkraphatWorawongsathiratYodfaChairachaRatsadathiratBorommarachathirat IVRamathibodi IIBorommaracha IIIBorommatrailokkanatBorommarachathirat IIIntharacha (king of Ayutthaya)RamrachathiratRamesuan (king of Ayutthaya)Thong LanBorommarachathirat IRamesuan (king of Ayutthaya)UthongMahathammaracha IVMahathammaracha IIIMahathammaracha IIMahathammaracha INgua Nam ThumLoe ThaiRam KhamhaengBan MueangSi Inthrathit

Family Tree of the Thai Monarchy[edit]

Family Tree of The Kings of Siam

See also[edit]

Notes[edit]

  1. ^ a b The portrait is believed to have depicted either Uthumphon or Ekkathat.
  2. ^ Accounts vastly differ to when Taksin stepped down from the throne and entered the monkhood, which has been argued to have occurred as early as three months prior to his execution.[8]
  3. ^ Traditionally accepted date of his execution
  1. ^ Baker, Chris; Phongpaichit, Pasuk (2017). A History of Ayutthaya: Siam in the Early Modern World. Cambridge University Press. p. 43. ISBN 978-1-316-64113-2.
  2. ^ Baker, Chris; Phongpaichit, Pasuk (2017). A History of Ayutthaya: Siam in the Early Modern World (Kindle Edition). Cambridge University Press. ISBN 978-1-316-64113-2.
  3. ^ Wyatt, David K. (2003). Thailand : A Short History (2nd ed.). Chiang Mai: Silkworm Books. ISBN 974957544X.
  4. ^ Baker, Chris; Phongpaichit, Pasuk (2017). A History of Ayutthaya: Siam in the Early Modern World (Kindle ed.). Cambridge University Press. p. 43. ISBN 978-1-316-64113-2.
  5. ^ Baker, Chris; Phongpaichit, Pasuk. A History of Thailand Third Edition (p. 301). Cambridge University Press. Kindle Edition.
  6. ^ กำเนิดจักรพรรดิ - พระเจ้าตากสินมหาราช ภูมิสุสานแห่งความมั่งคั่งอุดมสมบูรณ์ | HU LIN : A Landscape Cemetery of Abundance: ฮูลิน
  7. ^ Terwiel, B. J. (Barend Jan) (1983). A history of modern Thailand, 1767-1942. St. Lucia; New York : University of Queensland Press. ISBN 978-0-7022-1892-7. Archived from the original on 19 July 2021.
  8. ^ "ว่าด้วยพระเจ้าตาก ตอน 5: สองคน สองประวัติศาสตร์ EP.50". 3:41-3:55
  9. ^ คำให้การ วันประหาร “พระเจ้าตาก” ฉากสุดท้ายกรุงธนบุรี ศิลปวัฒนธรรม ฉบับสิงหาคม 2552
  10. ^ "ในหลวง-พระราชินี ทรงบำเพ็ญพระราชกุศลทักษิณานุปทานวันพระบรมราชสมภพและถวายพระราชสมัญญา ร.4 พระสยามเทวมหามกุฏวิทยมหาราช". ผู้จัดการออนไลน์. 2019-10-18. Retrieved 2019-10-18.
  11. ^ "Thai king to be crowned in coronation ceremonies May 4–6 - palace". euronews. 1 January 2019. Retrieved 12 November 2019.

Bibliography[edit]