Tonpa Shenrab (Wylie: ston pa gshen rab "Teacher gShenrab") or Shenrab Miwo (Wylie: gshen rab mi bo)—also called the Buddha Shenrab, Guru Shenrab and a number of other titles—is the founder of the Bon tradition of Tibet.
[Shenrab Miwo] occupies a position very similar to that of Śākyamuni in Buddhism, but... we have no available [or pre-10th century] sources with which to establish his historicity, his dates, his racial origin, his activities, and the authenticity of the enormous number of books either attributed directly to him or believed to be his word."
The story of Tonpa Shenrab was revealed in a fourteenth century terma of Loden Nyingpo.
The name Shenrab Miwo is in the Zhang-Zhung language, which is a relative of Old Tibetan; while many suggestions have been put forward as to its meaning, it appears to be the Zhangzhung word "bodhisattva" (equivalent to Tibetan shégya sempa, Wylie: shes rgya sems dpa').
According to Bon terma, Tonpa Shenrab predates Gautama Buddha. It is held that Tonpa Shenrab first studied the Bon doctrine in Tagzig Olmo Lung Ring, at the end of which he pledged to Shenlha Okar, the god of compassion, that he would guide the peoples of this world to liberation.
Like Gautama, Tönpa Shenrab was of royal birth. Tonpa Shenrab renounced his royal inheritance at the age of thirty-one to travel the path to enlightenment. Tonpa Shenrab embraced the life of a renunciate and commenced austerities, spreading the doctrine of Bon; at length, he arrived in the land of Zhangzhung near what is widely held to be Mount Kailash.