Penor Rinpoche's Lineage of Nyingtik Yabshyi
From Rigpa Wiki
Between Longchen Rabjam and the vidyadhara Jikmé Lingpa, there are fourteen masters in the lineage of transmission. However, when Jikmé Lingpa practised, focusing on the Omniscient Longchenpa, for three years in the Sangchen Metok Cave at Samyé Chimphu, Longchenpa actually appeared to him in a vision three times, and gave him the entire blessing of the transmission of his wisdom mind. So this was a short lineage which came directly and immediately down from Longchenpa to Jikmé Lingpa.
From Jikmé Lingpa, the teaching passed to Jikmé Gyalwé Nyugu, then to Jikmé Chökyi Wangpo (Patrul Rinpoche), and then to Nyoshul Lungtok Tenpé Nyima, who gave it to the great Khenchen Ngakgi Wangpo (Khenpo Ngaga). In turn, he transmitted it to his disciple, Shédrup Lungtok Tenpé Nyima, the incarnation of Nyoshul Lungtok. From this great master, His Holiness Penor Rinpoche received, it is said, almost all of the teachings of the Nyingtik cycle.
The transmission which Nyoshul Lungtok Tenpé Nyima gave to Khenchen Ngaga was in turn passed on by him to the vidyadhara Palchen Düpa, the second Pema Norbu Rinpoche. Khenpo Ngaga and Palchen Düpa were as teacher and student to one another. So Palchen Düpa would offer Khenchen Ngaga many teachings from the Nyingtik cycle, and likewise he received a considerable number of Nyingtik teachings from Khenchen Ngaga. Now, Palchen Düpa gave the transmission to Thubten Chökyi Dawa, the second Choktrul Rinpoche, who passed it on to Kyabje Drubwang Penor Rinpoche. In this way, the two lineages from Khenpo Ngaga merged into into one. Finally, Penor Rinpoche received the entire transmission of Nyingtik Yabshyi, along with the detailed explanation of the texts, from Kyabje Dilgo Khyentse Rinpoche.