gzims khang gong ma 01 bsod nams grags pa this last one referring to the Seat of the Upper Chamber established in 1554. According to TBRC his successors referring to the estate of the Zimkhang Gongma were Sonam Yeshe Wangpo (1556–92), Sonam Gelek Palzang (1594–1615) and Tulku Dragpa Gyaltsen (1619–1656) - closely connected to the famous story of Dorje Shugden. (Some say that Drakpa Gyeltsen was Sönam Drakpa’s second reincarnation, but usually he is considered to be the 4th incarnation of Panchen Sonam Dragpa). It seems to be commonly accepted that Dragpa Gyaltsen was the fourth holder of the "gzims khang gong ma" incarnation line. According to Tibetan Buddhist Resource Center "gzims khang gong ma 04 grags pa rgyal mtshan" has been his "primaryTitle". Since the search for his reincarnation has been banned, he has been the last one.