Where does “би” come from?

би (Kalmyk) comes from Written Oirat ᡋᡅ, from Proto-Mongolic bi — I.

би (Kalmyk): I

Definitions

Step	Language	Word	Meaning
1	Written Oirat	ᡋᡅ	I
2	Proto-Mongolic	bi	I

би — Etymology, Origin & Word History | Etymology Explorer