ཅང་མ་སེང (Kurtop) comes from Tibetan སེང, from Sanskrit सिंह, from Proto-Indo-Aryan sinźʰás, from Proto-Indo-Iranian sinȷ́ʰás, from Proto-Indo-European *sinǵʰós-.
Ancestry of “ཅང་མ་སེང”, step by step
ཅང་མ་སེང traces back through two separate lines of ancestry.