Pugyel is the name of a Tibetan royal lineage based in Yarlung. It likely derived from the name of a mythical ancestor, Olde Pugyel, who may be the same figure as Nyatri Tsenpo, who is said to have initiated the Yarlung dynasty in 390 BC. The dynasty, although not the family line, ended with the assasination of forty-third King Tri Udumtsen, also known as Langdarma, in 842 CE. The family is also called the Mugyel for the clan line of Mu (dmu), which is different from the ancestral Mu (rmu) clan.