After the death in 1923 of Philip Cosgrave, the Cumann na nGaedheal TD for Dublin South and brother of W. T. Cosgrave, O'Mara stood as the Cumann na nGaedheal candidate in the resulting by-election.
Philip II of Spain | Philip K. Dick | John Philip Sousa | Philip II | Philip Roth | Philip IV of Spain | Philip II of Macedon | Philip | Philip Bradbourn | Philip Catherine | Prince Philip | Philip V of Spain | Philip Pullman | Philip Sheridan | Philip Larkin | Philip IV of France | Philip the Good | Philip Sidney | Philip Marlowe | Philip IV | Philip III of Spain | Philip Hammond | Philip Webb | Philip Seymour Hoffman | Philip the Apostle | Philip Ruddock | Philip Massinger | Philip I of Castile | Philip Guston | Philip Doddridge |