Records of Prime Ministers of the United Kingdom Wilmington to Theresa May) University college with most alumni Prime MinistersChrist Church, Oxford13 (George Grenville to Sir Alec Douglas-Home) Vocational institution with most Prime Ministers as studentsThe Inns of Court11 (Lord Wilmington to Tony Blair). Of these, eight passed through Lincoln's Inn (William Pitt the Younger to Tony Blair). The first Prime Minister never to have been a university graduate was the Duke of Devonshire (served 1756–57), the last (as of ) was John Major (served 1990–97). The earliest Prime Minister to be an armed forces veteran was Henry Pelham, Prime Minister in 1743–54, who had served as a volunteer
Records of Prime Ministers of the United Kingdom Russell, was connected in different ways to two further Prime Ministers: Frederick North, Lord North (later Lord Guilford) and Lord ButeNorth's granddaughter, Lady Maria North, married Bute's great-grandson John Crichton-Stuart, 2nd Marquess of Bute. The Duke of Wellington and Lord SalisburySalisbury's paternal aunt Lady Georgiana Cecil married Henry Wellesley, 1st Baron Cowley, Wellington's brother. Lord Derby and Lord RoseberyRosebery's son Neil Primrose, married in 1915 Lady Victoria Stanley, daughter of the 17th Earl of Derby and great-granddaughter of the 14th Earl. The Prime Minister who had the most children is Lord Grey, who fathered 17 children (16 legitimate, one illegitimate).