Padraig Mac Giolla-Domhnaigh

Harrison—This name in the first case is the anglicised form in the Isle of Man and in the English mainland counties of the north-west of the Manx name McHarry (Mac Giolla-charraigh or Mac Charraigh) related undoubtedly to the Galloway name of McIlharry. In Co. Mayo the name is the anglicised form of Harrihy (O'h-Earchadha). McHarrie is a Galloway form.

Alphabetical Index of Anglicised Surnames in Ireland

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