Latin word quis comes from Proto-Indo-European *kʷ-

Detailed word origin of quis

Dictionary entry	Language	Definition
*kʷ-	Proto-Indo-European (ine-pro)
*kʷey	Proto-Indo-European (ine-pro)
quis	Latin (lat)	(in the neuter quid) how, why. (indefinite pronoun, alone and after si, nisi, num, ne) someone, something, anyone, anything; any. (interrogative pronoun) who, what.

Words with the same origin as quis