Information about King Si Suthammaracha of Ayutthaya

Si Suthammaracha (Thai: ศรีสุธรรมราชา) was the King of Ayutthaya from August 1656 to 26 October 1656 (2 months 17 days). He was a younger brother of Prasat Thong.

Not long after Si Suthammaracha seized the throne from Chao Fa Chai, He quarrelled with his nephew, Prince Narai, They began to fight against each other, Si Suthammaracha was captured and executed after being defeated in single combat with Narai on 26 October 1656.