Mac Céadaigh
Mac CÉADAIGH—IV—M'Keady, MacKeady, (?) MacGeady, Keady; 'son of Céadach' (derivative of céad, a hundred, hundred-possessing, a common personal name among the O'Farrells, O'Mores and Mageoghegans); an old Galway surname.
Alphabetical Index to Irish Surnames