He is certainly one and the same person as Steng pa Lo tsā ba Tshul khrims 'byung gnas.
Biography in Blue Annals, p. 1052. Disc. of Abhayākaragupta. In India he studied with thirteen pundits including Tsa mi (with whom he stayed for 10 years), and introduced to Tibet the transmission of the Mdo mang. On his second visit to Rdo rje gdan (which lasted 5 years), Tsa mi had already died. He invited Kha che A langga de wa to Tibet. The 3rd visit he studied the Bye brag Bshad mdzod. He seems to have been the first in Tibet to give Kanjur authorization readings (bka' 'gyur gyi lung).
Translator of 'Dul mdo'i rang 'grel by Guṇaprabha, published in 1976 in 2 volumes.
Aka Steng pa Lo tsā ba. Ga rong Tshul khrims 'byung gnas. Dungkar Rinpoche's dictionary, p. 473. Here his dates are given as 1107-1190.
