John Ponsonby Irish politician (1713-1787) (1713–1787) Parents Sarah Margetson Brabazon Ponsonby, 1st Earl of Bessborough Children Mary Charlotte Ponsonby George Ponsonby William Ponsonby, 1st Baron Ponsonby Frances Ponsonby Catharine Ponsonby Siblings William Ponsonby, 2nd Earl of Bessborough Lady Letitia Ponsonby Lady Sarah Ponsonby Lady Anne Ponsonby Alicia Colville Partners Lady Elizabeth Cavendish
