Intharacha (Thai: อินทราชา), or Intr'araja, nephew of Borommarachathirat I and former Lord of Suphanburi who had finally taken the Ayutthayan throne for the Suphannaphum Dynasty, reigned as the sixth king of Ayutthaya (1409–1424).

Upon his death, his two elder sons fought to the death in single combat aboard elephants. The throne then went to the youngest brother.