Padraig Mac Giolla-Domhnaigh

Hatton—This name in South Derry, parts of Antrim, and in North Down, is a shortened anglicised form of the Sept name M'Ilhatton (Mac Giolla-Chatain)—the Son of the Grille of St. Catain.

Alphabetical Index of Anglicised Surnames in Ireland

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