Thai order of precedence

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 Vice King
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
18. Sons of Prince Matayabitak, the Prince Maternal Grandfather of Rama V
19. Sons of the Deputy Vice King and Royal Consort
20. Grandsons of the Sovereign who are sons of son of Sovereign and the commoner
21. 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
19. Daughters of Prince Matayabitak, the Prince Maternal Grandfather of Rama V
20. Daughters of the Deputy Vice King and Royal Consort
21. Granddaughters of the Sovereign who are daughters of son of Sovereign and the commoner
22. Royal Great Granddaughters of the Sovereign

Current Order of Precedence

Order	Name	Note
1	The King
2	The Queen Mother	Given honor as the Queen Mother
3	The Queen
4	The Princess Debaratanarajasuda
5	The Princess Srisavangavadhana
6	Princess Ubolratana Rajakanya	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	The Princess Suddhanarinatha	Bestowed the honor on a special case
8	The Princess Rajasarinisiribajra
9	Princess Sirivannavari
10	Prince Dipangkorn Rasmijoti
11	Princess Siribhachudabhorn
12	Princess Aditayadornkitikhun
13	Thanphuying Ploypailin Jensen	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.
14	Thanphuying Sirikitiya Jensen	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	Thanphuying Dhasanawalaya Sornsongkram	Graciously accepted to be ranked higher than a prince who is the title Serene Highness is a special case.
16	Jitat Sornsongkram	Graciously accepted to be ranked higher than a prince who is the title Serene Highness is a special case.
17	Prince Wiangwatthana Jayankura
18	Princess Uthaithiang Jayankura
19	Prince Charunritdet Jayankura
20	Prince Pusan Svastivatana
21	Prince Bhisadej Rajani
22	Princess Uthaikanya Bhanubandhu
23	Prince Nawaphan Yugala
24	Prince Mongkhonchaloem Yugala
25	Prince Chaloemsuek Yugala
26	Prince Thikhamphon Yugala
27	Prince Chatrichalerm Yugala
28	Prince Chulcherm Yugala
29	Princess Nopphadonchaloemsi Yugala
30	Induratana Paribatra
31	Juthavachara Vivacharawongse
32	Vacharaesorn Vivacharawongse
33	Chakriwat Vivacharawongse
34	Vatchrawee Vivacharawongse
35	Wutchaloem Vudhijaya
36	Phanwarophat Svetarundra
37	High Lady Phansawali Kitiyakara
38	Phanuma Phiphitphokha
39	Sisawangwong Bunyachittradun
40	Phummariphirom Shell
41	Malinimongkhon Amatyakul
42	Patthamanarangsi Senanarong

References

1. Chulalongkorn (2017-10-19). "ธรรมเนียมราชตระกูลในกรุงสยาม". vajirayana.org. Retrieved 2020-01-27.