From Wikipedia, the free encyclopedia
Jump to: navigation, search
Phra Ratsadathirat
King of Ayutthaya kingdom
King of Siam
Reign 1533–1534
Predecessor Somdet Phra Borommarachathirat IV
Successor Somdet Phra Chairachathirat
Full name
Phra Ratsadathirat
House Suphannaphum Dynasty
Father Somdet Phra Borommarachathirat IV
Born 1529
Died 1534

Phra Ratsadathirat[1] (Thai: พระรัษฎาธิราช) (1529–1534) was the king of Ayutthaya from 1533 to 1534 - only for 5 months. Prince Ratsadathirat was the son of Borommaracha IV who died suddenly in 1533 from an epidemic of smallpox. Prince Ratsadathirat, aged 5, succeeded his father as the king of Ayutthaya. Due to his minority, his government was dominated by a number of regents including the Samuha Na Yok and the Samuha Kalahom.

In 1534, his uncle Prince Chairacha who was the Uparaja at Pitsanulok staged a coup and executed Ratsdadathirat and then assumed the throne of Ayutthaya.


  1. ^ The Royal Institute. List of monarchs Ayutthaya. (Thai)
Born: 1529 Died: 1534
Regnal titles
Preceded by
Borommarachathirat IV
King of Ayutthaya
Succeeded by