Where does “χαΐνης” come from?

χαΐνης (Greek) comes from Turkish hain, from Arabic خائن, from Arabic خان, from Arabic قَان, from Old Turkic 𐰴𐰣, from Old Turkic 𐰴𐰍𐰣, from English kagan — Alternative spelling of khagan.

χαΐνης (Greek): fugitive, mutineer, outlaw; partisan, rebel, insurgent