Borommarachathirat IV (Athittayawong)

Borommarachathirat IV, also known as Borommaracha No Phutthangkun, born Athittayawong, was the king of Ayutthaya, an ancient kingdom in Siam, from 1529 to 1533.

Life and reign

Borommarachathirat was born Prince Athittayawong to Ramathibodi II in 1488. He was named uparaja at Phitsanulok in 1515.
Following his father's death, Athittayawong succeeded the throne as Borommarachathirat IV. He appointed his brother, Prince Chairachathirat, as uparaja. Borommarachathirat died abruptly in 1533 due to a smallpox epidemic; however, contrary to the tradition established by the Front Palace system, the throne passed not to the uparaja but to Borommarachathirat's five-year-old son, who would rule as Ratsadathirat.