 Yuthok Yontan Gonpo the Younger

Yuthok Yonten Gonpo the Younger (Wylie transliteration g.yu thog gsar ma yon tan mgon po) (1126–1202) was a Tibetan doctor and "ngakpa" (lay, non-monastic tantric practitioner), credited with composing the "Four Medical Tantras" ("rgyud bzhi"), a four-book treatise on Traditional Tibetan Medicine which forms the main course of study in the Tibetan medical tradition.He is widely regarded as the main founder of Tibetan medicine, mostly based on his composition of the "Four Medical Tantras".