He was a son of Prince Bang Klang Hao, who ruled as King Sri Indraditya, and Queen Sueang,[2] though legend claims his real parents as an ogress named Kangli and a fisherman.[3] He had two brothers and two sisters. His eldest brother died while young. The second, Ban Muang, became king following their father's death, and was succeeded by Ram Khamhaeng following his own death.[4]