Borommarachathirat IV

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Somdet Phra Borommaracha Thirat IV
สมเด็จพระบรมราชาธิราชที่ 4
King of Ayutthaya kingdom
King of Siam
Reign 1529–1533
Predecessor Somdet Phra Ramathibodi II
Successor Phra Ratsadathirat
Issue Ratsadathirat
Full name
Somdet Phra Borommaracha Thirat IV
House Suphannaphum Dynasty
Father Somdet Phra Ramathibodi II
Died 1533

Somdet Phra Borommaracha Thirat IV (Thai: สมเด็จพระบรมราชาธิราชที่ 4) or Somdet Phra Borommarachathirat No Phutthangkun (Thai: สมเด็จพระบรมราชาหน่อพุทธางกูร), formerly Prince Athittayawong, was the short-reigning king of Ayutthaya from 1529 to 1533. Prince Athittayawong was the son of Ramathibodi II and became the Uparaja in 1515. Following his father's death, Athittayawong succeeded the Ayutthayan throne as Borommaracha IV. He appointed his brother, Prince Chairachathirat, as the Uparaja at Phitsanulok. Borommaracha IV died abruptly in 1533 due to a smallpox epidemic, leaving the throne to his five-year-old son, Prince Ratsadathirat.[1]:72

Borommarachathirat IV
Born:  ? Died: 1533
Regnal titles
Preceded by
Ramathibodi II
King of Ayutthaya
Succeeded by
Preceded by
Ramathibodi II
Crown Prince
King of Sukhothai

Succeeded by


  1. ^ Rajanubhab, D., 2001, Our Wars With the Burmese, Bangkok: White Lotus Co. Ltd., ISBN9747534584