Mac Muircheartaigh
Mac MUIRCHEARTAIGH—IV—M'Murihertie, M'Mirirtie, M'Moriertagh, M'Mortagh, M'Miertagh, M'Murtough, M'Murthoe, M'Morte, MacMurtrie, MacMurtery, MacMurtry, MacMurdy, MacMordie, MacMutrie, MacMrearty, MacBrearty, MacBrairty, MacMearty, MacMerty, Murtagh, Mortagh, Murtaugh, Murdough, Murdoch, Murdock, Murdow, Murtha, Murta, Murdy, Murt, (Mortimer); 'son of Muircheartach' (sea-director, navigator); a very common Irish patronymic which, in many instances, has undoubtedly become a family name; also the name of a Scottish family in Argyleshire, some of whom have settled in Ulster. See Mac Mhuircheartaigh.
Alphabetical Index to Irish Surnames