Where does “ιρλανδικός” come from?

ιρλανδικός (Greek) comes from Greek Ιρλανδία, from French Irlande, from English Ireland, from Middle English Irlond, from Old English Īrland, from Old English Īras, from Old Norse Írar, from Old Irish Ériu — fat, milk.

ιρλανδικός (Greek): Irish