Erhardt in Prats, Pandita, p. 29. Sanskritic form of name given as Ratnalakṣmi.
PPTK, pp. 245-248, lists titles of three volumes of his collected works (these are labelled KHA through NGA, so apparently there is a missing first volume).
Bibliography:
Sgra mi snyan pa'i tshe'i rang gzugs zhes bya ba'i lo rgyus mdor bsdus.
Drepung Catalog, p. 812. Name given as 'Bri gung pa Ratna'i ming can.