Padraig Mac Giolla-Domhnaigh

Oaks—This name is the anglicised form of Darragh and Darroch, a Scottish name in Antrim and in the West of Scotland, and of McDara, a name found in Southern Ulster; from dair, an oak. See Darragh.

Alphabetical Index of Anglicised Surnames in Ireland

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