De Brugha
de BRUGHA—XI—de Bury, Burewe, Bru, Bury, Burrows, Burrowes, etc., and indirectly Burgess; i.e., 'at the borough,' from residence therein; the English equivalent of the Norman de Burgo or Burke, being derived from the dative form of the Old English 'burg.'
Alphabetical Index to Irish Surnames