Mac Giolla Chatáin
Mac GIOLLA CHATÁIN—IV—M'Gillycattan, MacIllhatton, MacIlhatton, MacElhatton, Maclehatton, MacClatton, MacHatton, Hatton; 'son of Giolla Chatáin' (servant of St. Catan); a well-known Ulster surname.
Alphabetical Index to Irish Surnames