Dharma Wheel

Anyone have any idea who Siddha Dorje Tsoncha was? (Sometimes called Pandita Dorje Tsoncha.)

He is an Indian master, several of his works dealing with outer tantras are included in Tengyur. His more common name is Dorje Kocha. As for his Indian name I think it is Vajravarman, not to be confuesd with the king Vajravarman of Bangala.