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.
Henry Ley, 2nd Earl of Marlborough Henry Ley, 2nd Earl of Marlborough (3 December 1595 – 1 April 1638) was an English peer and Member of Parliament.