Padraig Mac Giolla-Domhnaigh

Judge—This name is the anglicised form of McBrehony and Brehony, especially in the districts surrounding Boyle in Co. Roscommon; Tubbercurry in Co. Sligo, and also in Ballymote; practically, I may say, in all parts of North Connacht. The name in Gaelic is chiefly written Mac An Breitheamhnaigh, from breitheamh, a judge.

Alphabetical Index of Anglicised Surnames in Ireland

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