Clanricarde, Ulick de Burgh, 5th earl and marquess of, 1604-57, Irish Catholic nobleman. He assisted James Butler, 12th earl of Ormonde, in his attempt, during the English civil war, to unite Catholic and Protestant royalists and hold Ireland loyal to Charles I against the rebellious English Parliament. When Ormonde left Ireland (1650), he named Clanricarde his deputy. Clanricarde made peace (1652) with Parliament's triumphant Lord General, Oliver Cromwell, in Ireland at the request of Charles II.