Virūpa's disciple was also called Kāṇha of Deliberate Behaviour (Tib. བརྟུལ་ཞུགས་ནག་པོ་པ་, trulshyug nagpopa), he was also known as the Eastern Kāṇha, (Tib. ནག་པོ་པ་ཤར་ཕྱོགས་པ་, nagpopa sharchokpa).
There is a second Nagpopa, Kṛṣṇasamayavajra, (Tib. ནག་པོ་པ་དམ་ཚིག་རྡོ་རྗེ་, nagpopa damtsik dorje), whose real name is Śribhadra, and who is the source of one of the four Hevajra transmissions of the Sakya tradition.
- Cyrus Stearns: Taking the result as the path: core teachings of the Sakya lamdré tradition, p.640 n.135