Where does “лы” come from?

лы (Tundra Nenets) comes from Proto-Samoyedic lë, from Proto-Uralic luwe, from Proto-Iranian *Hrawpācáh, from Proto-Indo-Iranian *Hrawpāćás.

лы (Tundra Nenets): bone

Definitions

Step	Language	Word	Meaning
1	Proto-Samoyedic	lë	bone
2	Proto-Uralic	luwe	bone
3	Proto-Iranian	*Hrawpācáh	—
4	Proto-Indo-Iranian	*Hrawpāćás	—

лы — Etymology, Origin & Word History | Etymology Explorer