Wikipedia
Mahathammarachathirat (king of Ayutthaya)
Mahathammarachathirat or Sanphet I , or Maha Tammaraja, formerly known as Khun Phirenthrathep , or Khun Piren, was the first King of Ayutthaya Kingdom of the Sukhothai dynasty ruling from 1569 to 1590. As a powerful Sukhothai noble, Phirenthrathep gradually rose to power. After playing many political turns, he was eventually crowned as the King of Siam.