Phetracha was a king of the Ayutthaya kingdom in Thailand, usurping the throne from his predecessor King Narai and founding the Ban Phlu Luang dynasty, the final one of the Ayutthaya kingdom.252 Originally a member of king Narais extended family , he was a trusted councilor of Narai, and leader of the Royal Elephant Corps. However, in 1688 he led the Siamese revolution of 1688, had Narais heirs executed, and by marrying Narais only daughter took the throne of Ayutthaya kingdom upon Narais death. He reversed the proWestern policies of Narai, ejecting foreigners from the kingdom, and launched the Siege of Bangkok, to exile all French troops from Siam. As a result, Siam stayed isolated from Western contact until the 19th century.
Phetracha was born in 1632 at Baan Plu Luang, Suphanburi. De la Loubre has recorded that he was a cousin of King Narai, and that his mother was also King Narais wet nurse. It was also recorded that his sister was one of King Narais queens.
Source: Wikipedia