Denison, Deniss - Anglicised Surnames in Ireland

Padraig Mac Giolla-Domhnaigh
1923

Denison, Deniss—In the districts of Cong, Co. Mayo, and Sligo the name McDonagh (Mac Donnchadh) has been anglicised Denison and Deniss. The McDonaghs were a branch off from the McDermotts of Moylurg, and ruled in Sligo.

Alphabetical Index of Anglicised Surnames in Ireland

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