De íréis
de ÍRÉIS—XII—de Ires, Irish; Norman 'le Ireis,' i.e., the Irishman, a descriptive name given in England to an early emigrant from Ireland; the Christian names in the Hundred Rolls show, however, that the emigrant was of Norman extraction. The exile, or one of his descendants, brought back the surname to Kilkenny, where, however, it has always been rare.
Alphabetical Index to Irish Surnames