Padraig Mac Giolla-Domhnaigh

Kay—This same is of Gaelic origin in the Isle of Man and is found commonly in Lancashire and Cheshire, and in the large manufacturing districts surrounding Liverpool and Manchester. It is the equivalent of the Scottish sept names MacKay and MacKie, and is found in various forms, namely, Kaye, Keye, Key, Kee, Kie, and Quay, the latter form being the most common in the Isle of Man. In Gaelic Mac Aoidh.

Alphabetical Index of Anglicised Surnames in Ireland

See also Woulfe’s Irish Names and Surnames
and O'Hart's Irish Pedigrees