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.
George Spencer, 2nd Earl Spencer George John Spencer, 2nd Earl Spencer, (1 September 1758 – 10 November 1834), styled Viscount Althorp from 1765 to 1783, was a British Whig politician. He notably served as Home Secretary from 1806 to 1807 in the Ministry of All the Talents.