Where does “Éire” come from?
Éire (Irish) comes from Old Irish Ériu, from Primitive Irish *Īweriū, from Proto-Celtic Φīweryū, from Proto-Indo-European piHweryon-, from Proto-Indo-European peyH- — fat, milk.
Éire (Irish): Ireland
Ancestry of “Éire”, step by step
Words derived from “Éire”