Padraig Mac Giolla-Domhnaigh

Cox—This name is the anglicised form of some few Irish sept names, in the first case being the anglicised form of M'Gilly (Mac Concailleadha).

M'Gilly is found in the northern parts of Co. Armagh, and southern Co. Tyrone. This is the older form of Mac Conchoille, and is also anglicised Woods. It is an Orghiall sept name, and Cox in the district of Clones, Co. Monaghan, is one of its anglicised forms. Father Woulfe quotes the following from Dr. O'Donovan: Mac Coiligh, in Co. Roscommon; O'Coiligh, in Co. Donegal and North Connacht; Mac Conchoille, in Fermanagh and Monaghan, referred to above; and Mac Coilgin, in Co. Cork. See Woods.

Alphabetical Index of Anglicised Surnames in Ireland

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