When did the first titleholder of the title in the Peerage of Great Britain that was created in 1965 die?
Earl Spencer (peerage): Earl Spencer is a title in the Peerage of Great Britain that was created on 1 November 1765, along with the title Viscount Althorp, of Althorp in the County of Northampton, for John Spencer, 1st Viscount Spencer. John Spencer, 1st Earl Spencer: John Spencer, 1st Earl Spencer (19 December 1734 – 31 October 1783) was a British peer and politician.
31 October 1783