Where does “Irish” come from?

Irish (Cebuano) comes from English Irish, from Middle English Irisce, from Old English Īras, from Old Norse Írar, from Old Irish Ériu, from Primitive Irish *Īweriū, from Proto-Celtic Φīweryū, from Proto-Indo-European piHweryon- — fat, milk.

Irish (Cebuano): an Irishman or Irishwoman; pertaining to or...