), a descendant of a branch of the Old Tibetan dynasty of the Tibetan Empire, was forced to flee to the West Tibet during the Tibetan Era of Fragmentation. He married a princess of Purang and obtained the alliance of local chieftains. He expanded his kingdom to stretch from the Mayum La in the east to the Zoji La in the west. Upon his death, his vast kingdom was divided among his three sons: the eldest son, Lhachen Palgyigon, receiving Maryul, the second son, Trashigon, receiving Guge and Purang, and the third son, Detsukgon, receiving Zanskar (mountainous area between Ladakh and Kashmir).