William St. Lawrence, 2nd Earl of Howth Anglo-Irish peer (1752–1822) Parents Isabella King Thomas St Lawrence, 1st Earl of Howth Children Thomas St Lawrence, 3rd Earl of Howth Lady Matilda St. Lawrence Lady Catherine St. Lawrence Lady Harriet St. Lawrence Mary St. Lawrence Lady Isabella St. Lawrence Siblings Thomas St Lawrence Lady Elizabeth St. Lawrence Lady Isabella St. Lawrence Henry St. Lawrence Lady Frances St. Lawrence Partners Mary Bermingham Margaret Burke