John Albert William Spencer-Churchill, 10th Duke of Marlborough (Nov 1934); shortly after assuming the title. He was the son of Consuelo Vanderbilt and "Sunny" Charles Richard John Spencer-Churchill, 9th Duke of Marlborough.
John Spencer, I loved him on the West Wing. He died of a heart attack in a hospital 4 days before his 59th birthday. At the time of his death, Spencer had filmed two of the five West Wing episodes that were in post-production and his death was subsequently written into the show's seventh and final season, in which McGarry was said to have died of a heart attack on election night. December 20, 1946 - December 16, 2005
Consuelo Vanderbilt | The Duchess of Marlborough (c. 1899) with her two infant sons: (l) Lord Ivor Charles Spencer-Churchill, b. 14 Oct 1898; (r) John Albert William Spencer-Churchill, Marquess of Blandford, b. 18 Sep 1897 (later the 10th Duke of Marlborough).