Thai order of precedence explained

Royal Family

King Chulalongkorn described the order of precedence in his literature "Traditional of Royal Family of Siam".^[1]

Gentlemen

1. The Sovereign
2. The Viceroy (Grand Commander)
3. The Viceroy (Commander)
4. The Deputy Viceroy
5. Sons of the Former Sovereign and Queen
   1. Great Uncles of the Sovereign
   2. Uncles of the Sovereign
   3. Brothers of the Sovereign
6. Sons of the Sovereign and Queen
7. Sons of the Former Sovereign and Royal Consort
   1. Great Uncles of the Sovereign
   2. Uncles of the Sovereign
   3. Brothers of the Sovereign
8. Sons of the Sovereign and Royal Consort
9. Sons of the Former Sovereign and Royal Concubine
   1. Great Uncle of the Sovereign
   2. Uncles of the Sovereign
   3. Brothers of the Sovereign
10. Sons of the Sovereign and Royal Concubine
11. Nephews of the Sovereign
12. Grandsons of the Sovereign who are sons of son of the Sovereign and daughter of the Sovereign
13. Sons of the Viceroy and Royal Consort
14. Sons of the Former Viceroy
15. Sons of the Viceroy
16. Grandsons of the Sovereign who are sons of son of the Sovereign and Queen or Royal Consort and Princess
17. Grandsons of the Sovereign who are sons of son of the Sovereign and Royal Concubine and Princess
    1. Sons of Prince Matayabitak, the Prince Maternal Grandfather of Rama V Sons of the Deputy Viceroy and Royal Consort
18. Grandsons of the Sovereign who are sons of son of Sovereign and the commoner
19. Royal Great Grandsons of the Sovereign

Ladies

1. Queen Mother
2. The Sovereign's Consort (Queen)
3. Queen Dowager
4. Royal Consort
5. Daughters of the Former Sovereign and Queen
   1. Great Aunts of the Sovereign
   2. Aunts of the Sovereign
   3. Sisters of the Sovereign
6. Daughters of the Sovereign and Queen
7. Daughters of the Former Sovereign and Royal Consort
   1. Great Aunts of the Sovereign
   2. Aunts of the Sovereign
   3. Sisters of the Sovereign
8. Daughters of the Sovereign and Royal Consort
9. Daughters of the Former Sovereign and Royal Concubine
   1. Great Aunts of the Sovereign
   2. Aunts of the Sovereign
   3. Sisters of the Sovereign
10. Daughters of the Sovereign and Royal Concubine
11. Nieces of the Sovereign
12. Royal Consort who are granddaughters of the Sovereign
13. Granddaughters of the Sovereign who are daughters of son of the Sovereign and daughter of the Sovereign
14. Daughters of the Viceroy and Royal Consort
15. Daughters of the Former Viceroy
16. Daughters of the Viceroy
17. Granddaughters of the Sovereign who are daughters of son of the Sovereign and Queen or Royal Consort and Princess
18. Granddaughters of the Sovereign who are sons of daughters of the Sovereign and Royal Concubine and Princess
    1. Daughters of Prince Matayabitak, the Prince Maternal Grandfather of Rama V Daughters of the Deputy Viceroy and Royal Consort
19. Granddaughters of the Sovereign who are daughters of son of Sovereign and the commoner
20. Royal Great Granddaughters of the Sovereign

Current Order of Precedence

Order	Name	Note
1
2		Given honor as the Queen Mother
3
4
5
6		In spite of relinquishing all noble titles, she is included in the order because she is the daughter of the former King and oldest sister of the current King
7		Bestowed the honor on a special case
8
9
10
11
12
13	HH Prince Chaloemsuek Yugala
14		She is granddaughter of the former King, graciously accepted to be ranked higher than a prince who is the title Serene Highness is a special case.
15		She is granddaughter of the former King, graciously accepted to be ranked higher than a prince who is the title Serene Highness is a special case.
16		Graciously accepted to be ranked higher than a prince who is the title Serene Highness is a special case.
17	Capt. Jitat Sornsongkram	Graciously accepted to be ranked higher than a prince who is the title Serene Highness is a special case.
18	HSH Princess Uthaithiang Jayankura
19	HSH Prince Charunritdet Jayankura
20	HSH Princess Uthaikanya Bhanubandhu
21	HSH Prince Nawaphan Yugala
22	HSH Prince Thikhamphon Yugala
23
24	HSH Prince Chulcherm Yugala
25	HSH Princess Nopphadonchaloemsi Yugala
26
27	Mr Juthavachara Vivacharawongse
28	Mr Vacharaesorn Vivacharawongse
29	Mr Chakriwat Vivacharawongse
30	Mr Vatchrawee Vivacharawongse
31	Khunying Wutchaloem Vudhijaya
32	Mrs Phanwarophat Svetarundra
33	Thanphuying Phansawali Kitiyakara
34	Mrs Phanuma Phiphitphokha
35	Mrs Sisawangwong Bunyachittradun
36	Mrs Phummariphirom Shell
37	Mrs Patthamanarangsi Senanarong

Notes and References

1. Web site: ธรรมเนียมราชตระกูลในกรุงสยาม . Chulalongkorn . 2017-10-19 . vajirayana.org . 2020-01-27.