Which British peer and politician born in 1734 was a great-grandson of the 1st Duke of Marlborough?
John Spencer, 1st Earl Spencer John Spencer, 1st Earl Spencer (19 December 1734 – 31 October 1783) was a British peer and politician.
Peregrine Osborne, 2nd Duke of Leeds Vice-Admiral Peregrine Osborne, 2nd Duke of Leeds (1659 – 25 June 1729), styled Viscount Osborne between 1673 and 1689, Earl of Danby between 1689 and 1694 and Marquess of Carmarthen between 1694 and 1712, was an English Tory politician.