Dudjom Rinpoche (1904-87) (Tibetan, bdud-'joms rinpoche ‘jigs-’bral ye-shes rdo-rje). A renowned modern tülku and former head of the Nyingma lineage. He belonged to the Mindroling (smin-drol-ling) lineage but was also well versed in many other lineages as well as being a great Dzogchen master and revealer of hidden textual treasures (gter-ston).

A Dictionary of Buddhism, Oxford University Press, 2003, 2004 (which is available in electronic version from answer.com)