Ratchasakun


Ratchasakun refers to the surnames indicating royal descent from a Thai monarch of the Chakri Dynasty, first established in 1912 after King Rama VI enacted a series of laws granting surnames to the Thai people, with the laws expressly stating that all Thai citizens must have a "surname" indicating who they are related to, or whom they are descended from with those who are direct members of the royal bloodlines to be called ratchasakun, those who have marital ties to the royal family to be referred to as ratchanikun, and those descended from a Chakri Front Palace to be called bowon ratchasakun.

Ratchatrakul

Ratchatrakul are the royal houses which are descended directly from the siblings of King Rama I.
There are six ratchatrakulThere are six ratchatrakulThere are six ratchatrakul--
Romanized SpellingModern/Alternative SpellingThaiName of founderOffspring
NarindrānkuraNarintarangul
Narintaranghul
Narintarangkul		นรินทรางกูรHRH Prince Thongchin, the Prince Narindhanarej11 HSH Princes, 5 HSH Princesses
DevahastinThephasadinเทพหัสดินHRH Prince Tan, the Prince Devahariraksa6 HSH Princes, 1 HSH Princesses
MontrikulมนตรีกุลHRH Prince Chui, the Prince Bhitakmontri15 HSH Princes, 22 HSH Princesses, 1 prince elevated to Phra Ong Chao
IsarānkuraIsarangkun
Isarangkun
Issarungkula		อิศรางกูรHRH Prince Khet, the Prince Isarangkula Nhurak26 HSH Princes, 41 HSH Princesses, 15 unknown princely descendants, 1 prince elevated to Phra Ong Chao
CheshtānkuraChesadangkul
Jessadangkul		เจษฎางกูรHRH Prince La, the Prince Chakrachedha8 HSH Princes, 9 HSH Princesses
NarindrakulaNarintarakulนรินทรกุลHRH Princess Khu, the Princess Narindharadevi2 HRH Princes, Grandchildren of founder: 2 HSH Princes, 3 HSH Princesses

Ratchasakun

Ratchasakun refers to those who are directly descended from a Thai monarch. This refers to those not of the immediate royal family, meaning those of the rank of Serene Highness or below. Untitled ratchasakun or spouses of ratchasakun shall take the suffix of Na Ayudhya behind the surname as well, to signify royal heritage.

Royal Houses descended from Rama I

Royal Houses descended from Rama II

Royal Houses descended from Rama III

Royal Houses descended from Rama IV

*Order column derived from the original numerical order taken by Rama VI when granting surnames. Some were omitted from the original count by the king:
Kritākara: Not counted in Rama VI's specific order, granted as the 721st surname.
Gaganānga: No surviving male descendants at the time of granting.
Navavongsa: Not counted by Rama VI in his specific order, but granted as the 226th surname.
Supratishtha: Not counted by Rama VI in his specific order, granted as the 1403rd surname.

Royal Houses descended from Rama V

Royal Houses descended from Rama VII