The Thai nobility was a social class comprising titled officials (''khunnang'', ) in the service of
the monarchy. They formed part of a hierarchical social system which developed from the time of the
Ayutthaya Kingdom
The Ayutthaya Kingdom or the Empire of Ayutthaya was a Thai people, Thai kingdom that existed in Southeast Asia from 1351 to 1767, centered around the city of Phra Nakhon Si Ayutthaya (city), Ayutthaya, in Siam, or present-day Thailand. Europe ...
(14th century – 1767), through the
Thonburi
__NOTOC__
Thonburi () is an area of modern Bangkok. During the era of the Ayutthaya Kingdom, Kingdom of Ayutthaya, its location on the right (west) bank at the mouth of the Chao Phraya River had made it an important garrison town, which is ref ...
(1767–1782) and early
Rattanakosin (1782 onwards) periods. Reforms by King
Chulalongkorn
Chulalongkorn (20 September 1853 – 23 October 1910), posthumously honoured as King Chulalongkorn the Great, was the fifth king of Siam from the Chakri dynasty, titled Rama V. Chulalongkorn's reign from 1868 until his death in 1910 was cha ...
ended the system around the end of the 19th century, though noble titles continued to be granted until the
abolition of absolute monarchy in 1932.
Thai noble titles comprise a rank and a title, which denote the holder's post or office. Unlike in European aristocracies, Thai noble titles were not inherited, but individually granted based on personal merit. Nevertheless, familial influence was substantial, and some families were able to accumulate large amounts of wealth and power, especially during the 17th to 19th centuries.
History
While the use of noble rank and title words are found in the documents of many early
Tai city states including
Sukhothai, the earliest extensive descriptions are from the administrative reforms introduced in 1448 by King
Borommatrailokanat of Ayutthaya, which by then had become the dominant polity in the region. The reforms established official titles for high-ranking ministers of the ''
chatusadom
Chatusadom or Catustambha ( , literally "Four Pillars" from Sanskrit ''Catur'' "Four" + ''Stambha'' "Pillars") was the Thai system of central executive governance during the Ayutthaya Kingdom, Thonburi Kingdom and Rattanakosin Kingdom from 1454 ...
'' system, and the rank of ''phra'' was added to the previously used ''khun'' and ''nai'', in order to accommodate the expanding machinery of government. (The ranks ''luang'' and ''okya'' were further introduced during the mid- and late-16th century, respectively.) The ''
sakdina'' system, which assigned a numeral rank representing the amount of land one was entitled to own, was also officially described.
Nobles were not directly remunerated for their service, but enjoyed earnings and benefits derived from their office and the work of commoners (''
phrai'') under their command. Unlike in European aristocracies, Thai noble titles were not inherited, but individually granted by the king or his ministers based on personal merit. Noble families could, however, present their sons to the royal household, placing them at an advantage to succeeding in those positions. This practice became especially influential from the 17th century, when war subsided and commerce flourished, leading personal patronage to displace martial ability as the determining factor for promotions. Several noble families gained much power and influence during the late Ayutthaya period, and even more so during early Rattanakosin; some, such as the
Bunnags, effectively became as powerful as the monarchy.
King
Chulalongkorn
Chulalongkorn (20 September 1853 – 23 October 1910), posthumously honoured as King Chulalongkorn the Great, was the fifth king of Siam from the Chakri dynasty, titled Rama V. Chulalongkorn's reign from 1868 until his death in 1910 was cha ...
(Rama V, r. 1868–1910) introduced reforms that ended the system that allowed nobles to command manpower, and transformed titled nobles into paid officials under a modern civil service system. His successor
Vajiravudh
Vajiravudh (1 January 188126 November 1925) was the sixth Monarchy of Thailand, king of Siam from the Chakri dynasty, titled Rama VI. He reigned from 1910 until his death in 1925. King Vajiravudh is best known for his efforts to create and pro ...
(Rama VI, r. 1910–1925) introduced a military-style promotion-based rank system, superseding the traditional titles, though they could still be granted at the king's discretion.
Following the abolition of absolute monarchy in 1932, royal decrees issued during the government of
Plaek Phibunsongkhram
Plaek Phibunsongkhram; 14 July 1897 – 11 June 1964) was a Thai military officer and politician who served as the third prime minister of Thailand from 1938 to 1944 and again from 1948 to 1957. He rose to power as a leading member of the Kh ...
in 1942 abolished the use of noble titles and the rank system. While the decree abolishing titles was repealed by the
Khuang Aphaiwong
Khuang Aphaiwong (also spelled Kuang, Abhaiwong and Abhaiwongse; , ; 17 May 1902 – 15 March 1968), also known by his noble title Luang Kowit-aphaiwong (, ), was the founder of the Democrat Party and three times the prime minister of Thaila ...
government two years later, allowing previously held titles to be reinstated, the granting of noble titles never resumed after 1932.
Noble titles
Thai noble titles comprise a rank (, ) and a title (, ), which denote the holder's post or office (, ). For example, Chaophraya Chakri was the full title of the ''
samuhanayok'', one of the king's two chief ministers. ''Chaophraya'' was the highest rank of the nobility, and ''Chakri'' was the title associated with the post. The titleholder would also have received a numerical rank under the ''sakdina'' system.
Most major titles were tied to the post, and shared by successive holders, while others could be created specifically for a singular person by the King. The latter was the case especially from the late 19th century, as the proliferation of officials necessitated the creation of a large number of titles.
Nobles would be known almost exclusively by their current title. Historical references to holders of shared titles conventionally include the person's birth name in parentheses, e.g. ''Chao Phraya Chakri (Mut)'', who was chief minister under King
Taksin
King Taksin the Great (, , ) or the King of Thonburi (, ; ; Teochew: Dên Chao; 17 April 1734 – 7 April 1782) was the only king of the Thonburi Kingdom that ruled Thailand from 1767 to 1782. He had been an aristocrat in the Ayutthaya Kingdom ...
.
The ranks, in descending order, are:
*''Chaophraya'' (, ); particularly esteemed individuals were referred to as ''somdet chaophraya'' and were appointed by the king.
*''Phraya'' (, ); historically also appeared as ''okya'' (, ), probably from the equivalent Khmer term ''
oknha
''Oknha'' (, ) is a Khmer honorific. It has different meanings depending on the period it was used.
Linguistics
The word means "nobleman" or "lord".
The translation of "''Oknha''" is not unanimous. Leaning on the meaning of Vietnamese title " ...
''.
*''Phra'' (, )
*''Luang'' (, )
*''Khun'' (, )
*''Muen'' (, )
*''Phan'' (, )
*''Nai'' (, )
Posts and titles
Some of the noble posts and titles include:
Chief ministers
The ''samuhanayok'' was head of the
Mahatthai. During the Ayutthaya period, office-holders took the title ''Chakri'', with the rank of ''phraya''. The rank was increased to ''chaophraya'' during Thonburi, and in Rattanakosin individualized titles were granted to each appointee. According to the
Three Seals Law, the ''samuhanayok'' had a ''sakdina'' of 10,000.
The ''samuhakalahom'' was head of the
Kalahom
Chatusadom or Catustambha ( , literally "Four Pillars" from Sanskrit language, Sanskrit ''Catur'' "Four" + ''Stambha'' "Pillars") was the Thai system of central executive governance during the Ayutthaya Kingdom, Thonburi Kingdom and Rattanakosin ...
. Like the ''samuhanayok'', the post had a ''sakdina'' of 10,000. Most of office-holders were titled ''Chaophraya Mahasena'' well into the Rattanakosin period.
Ministers
Four ministers headed the four government departments of the ''chatusadom''. By the Rattanakosin period, the head of the Krom Mueang or Nakhonban were titled ''
Yommarat
Yommarat () is a Thai noble title historically given to the minister of the Krom Mueang or Nakhonban, one of the four ministries under the ''chatusadom'' system, which was responsible for maintaining peace and order in the capital. Holders of the ...
'', with most having the rank of ''chaophraya''. The head of the Krom Wang was titled ''Thammathikon'' after the department, or ''Thammathikoranathibodi''. Most heads of the Krom Phra Khlang took the rank and title ''Chaophraya Phra Khlang'', while during Ayutthaya period the title was also called ''Kosathibodi''. The heads of Krom Na or Kasettrathikan had the rank and title ''Chaophraya Phonlathep''.
Governors
Governorships were major noble positions, with several types of posts depending on the importance of the city. Each city had its associated noble title, e.g. ''Surasi'' for
Phitsanulok
Phitsanulok (, ) is a city municipality in northern Thailand and the capital of Phitsanulok province. It had a city population of 60,827 and an urban population of approximately 200,000 in 2024, making it Thailand's 19th-most populous city p ...
, ''Surinluechai'' for
Phetchaburi, ''Wichitphakdi'' for
Chaiya, ''
Aphaiphubet'' for
Phra Tabong (
Battambang
Battambang (, Romanization of Khmer#UNGEGN, UNGEGN: ) is the capital of Battambang province and the List of cities and towns in Cambodia, third largest city in Cambodia. The city is situated on the Sangkae River, which winds its way through t ...
), etc.
References
{{Nobility by nation
Ayutthaya Kingdom
Thonburi Kingdom
Rattanakosin Kingdom