Lady Henrietta St Lawrence (1851-1935) (1851–1935) Parents Thomas St Lawrence, 3rd Earl of Howth Henriette Barfoot Children Kenelm Lee Guinness Sir Algernon Guinness, 3rd Baronet Nigel Guinness Siblings Lady Geraldine St. Lawrence Lady Catherine St Lawrence William St Lawrence, 4th Earl of Howth Lady Mary St. Lawrence Margaret Domville Thomas St Lawrence Lady Emily St. Lawrence Partners Benjamin Guinness