| Background: MacMahon is one of the best known and most distinguished names in Ireland. In Irish Mac Mathghamha, or in ultra-modern spelling MacMahuna, it is said to be derived from the Irish word for a bear. It is borne by two quite distinct septs. One of these belongs to Co. Clare, in which county is now the most numerous name.
Variations: MacMahon, Maghan, Mann, Mohan, Maughan, Mahan, Vaughan.
More Info: http://heraldry.celticradio.net/search.php?id=138
Discussion of this family is welcomed.