What is "theingapati"

Theingapati (, ; ultimately derived from Sanskrit Simhapati; late 1270s – 10 May 1299) was heir-apparent of the Pagan Dynasty of Burma (Myanmar) from 1289 to 1297. The crown prince is known for his mission to Beijing in which he sought and received the Mongol Empire's recognition of his father, Kyawswa, as King of Pagan in March 1297. The prince was arrested after his father was overthrown in December 1297 by the three brothers of Myinsaing. The brothers branded the father-son duo as traitors and executed them in May 1299.