His father belonged to the Khon family , members of which were hereditary abbot - rulers of the Sakya Monastery in Tsang in western Tibet .
Rinchen Gyaltsen was born in 1238 as the son of Zangtsa Sonam Gyaltsen and his wife Jomo Dro .
Rinchen Gyaltsen 's father belonged to the Khon family , members of which were hereditary abbot - rulers of the Sakya Monastery in Tsang in western Tibet .
Rinchen Gyaltsen was born in 1238 as the son of Zangtsa Sonam Gyaltsen and his wife Jomo Dro .