Padraig Mac Giolla-Domhnaigh

Loftus—This name is the anglicised form of O'Loughnan (O'Lachtnain) in the districts surrounding Gort and Mountbellow in Co. Galway, and Cong, Co. Mayo. It is also anglicised Loftis. Loftus and Lofthouse are of Yorkshire origin.

Alphabetical Index of Anglicised Surnames in Ireland

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