Where does “كیم” come from?

كیم (Ottoman Turkish) comes from Karakhanid كِمْ, from Proto-Turkic kem — who.

Ancestry of “كیم”, step by step

Step	Language	Word	Meaning
1	Karakhanid	كِمْ	who
2	Proto-Turkic	kem	who

كیم — Etymology, Origin & Word History | Etymology Explorer