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Cognomen Cormac (Cormac , Cormick , Kormákur ) , worldwide, is quite a rare family name. The family name Cormac is habitual in Ireland, where it is quite a rare surname, Australia, and New Zealand, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in the United States, Australia, and Colombia. More frequently, Cormac is the forename as well as the last name.
Ryan, Reilly, Hughes, Cassidy, Collins, Brennan, Kennedy, Doherty, Farrell, Oconnor, O'Brien, O'Neill, Mccarthy, Sullivan, Connolly, Kavanagh, Rafferty, Donnelly, Flanagan, O'Connor, Gallagher, O'Connell, Mccann, Murphy, Murray, Molloy, Daly, Moore, Smith, Smyth, Barry, Boyle, Brady, Breen, Burke, Byrne, O'Sullivan, Kelly, Dunne, Duffy, Lynch, Nolan, Hogan, Flynn, Walsh, White, Quinn, Mallon, Doyle, and Fitzpatrick