Where does “Nord-Irland” come from?
Nord-Irland (Norwegian Nynorsk) comes from Norwegian Nynorsk Irland, from Old Norse Írland, from Old Norse Írar, from Old Irish Ériu, from Primitive Irish *Īweriū, from Proto-Celtic Φīweryū, from Proto-Indo-European piHweryon-, from Proto-Indo-European peyH- — fat, milk.
Ancestry of “Nord-Irland”, step by step