Mac Robhartaigh
Mac ROBHARTAIGH—IV—M'Rortie, MacRoarty; 'son of Robhartach'; the name of a Tirconnell family, the head of which lived at Ballymagroarty, near Donegal, and was keeper of the celebrated 'cathach' of St. Columcille. See Ó Robhartaigh.
Alphabetical Index to Irish Surnames