Padraig Mac Giolla-Domhnaigh

Gunn—In the districts surrounding Clones in Co. Monaghan, and Lisnaskea and other parts of Fermanagh; the name McElgunn has been further anglicised to the name Gunn (Mac Giolla-dhuinn), its other forms being McIldoon and McEldoon.

Alphabetical Index of Anglicised Surnames in Ireland

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