William St Lawrence, 4th Earl of Howth
William Ulick Tristram St Lawrence, 4th Earl of Howth KP was an Irish peer, styled Viscount St Lawrence until 1874. He became Earl of Howth in 1874 on the death of Thomas St Lawrence, 3rd Earl of Howth, and was appointed a Knight of the Order of St Patrick on 8 May 1884. The family titles became defunct as he died without heir.
