Where does “coi” come from?
coi (Old French) comes from Old French quei, from Latin quiētus, from Latin quiēscō, from Latin quiēs, from Proto-Italic kʷiētis, from Proto-Indo-European kʷyéh₁tis, from Proto-Indo-European kʷyeh₁- — to rest; rest, peace.
Ancestry of “coi”, step by step