Frederick Ponsonby (British Army officer)
…Ponsonby was the second of three sons of Frederick Ponsonby, Viscount Dungannon (who succeeded as the 3rd Earl of Bessborough in 1793), and his wife Henrietta (née Spencer), Countess of Bessborough. He was the brother of John Ponsonby, 4th Earl of Bessborough, and William Ponsonby, 1st Baron de Mauley, and his sister was the "notorious" Lady…