Another member of the Cecil family was the naval commander Edward Cecil, 1st Viscount Wimbledon (a title which became extinct on his death in 1638). He was the third son of the first Earl of Exeter. Also, Lord William Cecil, third son of the third Marquess, married Mary, 2nd Baroness Amherst of Hackney. Their grandson William succeeded in the barony in 1919. Another member of this branch of the family is Vice-Admiral Sir Nigel Cecil. The champion racehorse trainer Sir Henry Cecil was the son of Henry Cecil, a younger brother of the third Baron. Lord John Joicey-Cecil, fourth son of the third Marquess, was Conservative Member of Parliament for Stamford.