Where does “ain” come from?
ain (Old Irish) comes from Latin iēiūnium, from Latin iēiūnus, from Latin iaiūnus, from Proto-Italic jagjūnos, from Proto-Indo-European Hyeh₂ǵ-yu-, from Proto-Indo-European Hyeh₂ǵ-ye/o- — to sacrifice.
Ancestry of “ain”, step by step