Khenchen Thubten Chöpel
Changma Khenchen Thubten Chöpel (Tib. ལྕང་མ་མཁན་ཆེན་ཐུབ་བསྟན་ཆོས་འཕེལ་, Wyl. lcang ma mkhan chen thub bstan chos 'phel) aka Bathur Khenpo Thupga (བ་ཐུར་མཁན་པོ་ཐུབ་དགའ་, ba thur mkhan po thub dga'), or Thubga Yishyin Norbu (1886-1956) — an important student of Khenpo Yönga and Orgyen Tenzin Norbu who followed in the footsteps of Patrul Rinpoche. He was renowned for his great scholarship, especially in relation to the Guhyagarbha Tantra, his contribution to the flourishing of the monastic tradition, and his realization of the Dzogchen teachings. Some of his most important students were: Dilgo Khyentse Rinpoche, Khenpo Jikmé Phuntsok, Gonpo Tseten Rinpoche, Chagdud Tulku Rinpoche and the Sixth Dzogchen Rinpoche, Jikdral Changchub Dorje.
- Nyoshul Khenpo, A Marvelous Garland of Rare Gems: Biographies of Masters of Awareness in the Dzogchen Lineage, Padma Publications, 2005, pages 471-472.