H.H. Tsogkhang Rinpoche who was a son of H.H. Serta Rinpoche. He was one who saved all lineage and system of Troma
Tsokhang Choktrul Tsewang Dorje aka Kusho Tsewang was a major Dudjom Tersar lineage holder in the western part of Tibet, around Mount Kailash. Born as one of the four sons of Golok Serta Rinpoche, he also became one of his main students.
One of his sons is Lama Rangrig.