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.
Robert Spencer, 1st Viscount Teviot Robert Spencer, 1st Viscount Teviot (1629 – 20 May 1694), styled The Honourable Robert Spencer until 1685, was an English politician from the Spencer family who sat in the House of Commons from 1660 to 1679.