Thomas Pelham-Holles, (1693-1768) Duke of Newcastle upon Tyne and 1st Duke of Newcastle under Lyme, served Sir Robert Walpole for over 20 years and became Prime Minister in the 1750s.
Reference:
Reed Browning, ‘Holles, Thomas Pelham-, duke of Newcastle upon Tyne and first duke of Newcastle under Lyme (1693-1768)’, Oxford Dictionary of National Biography, (Oxford University Press, 2004; online edn, May 2011 http://www.oxforddnb.com/view/article/21801 [accessed 17 July 2013]).
Dates: to
Occupation: Unknown
Relationship to Sloane: Virtual International Authority File: