William Ponsonby, 1st Baron de Mauley British politician (1787-1855) (1787–1855) Parents Henrietta Ponsonby, Countess of Bessborough Frederick Ponsonby, 3rd Earl of Bessborough Children Charles Ponsonby, 2nd Baron de Mauley Ashley Ponsonby Frances Anne Georgina Ponsonby Siblings John Ponsonby, 4th Earl of Bessborough Frederick Cavendish Ponsonby Lady Caroline Lamb Harriet Osborne, Baroness Godolphin George Arundel Stewart Partners Lady Barbara Ashley-Cooper
