Chelsea, the son and heir of George Henry Cadogan, 5th Earl Cadogan. Together, they had two sons and three daughters: Lady Sarah Consuelo Spencer-Churchill (1921–2000), who married Edwin Fariman Russell (1914–2001) in Westminster in 1943. They divorced in Reno, Nevada in 1966 and she married Guy Burgos Ossa the same year. They divorced in 1967 in Mexico and she married thirdly to Theo Roubanis in Philadelphia in 1967. Lady Caroline Spencer-Churchill (1923–1992), who married Major Charles Huguenot Waterhouse (1918–2007) of Middleton Hall, Middleton-by-Youlgreave in Woodstock, Oxfordshire in 1946. John George Vanderbilt Henry Spencer-Churchill, 11th Duke of Marlborough (1926–2014), who married four times. Lady Rosemary Mildred Spencer-Churchill (b. 1929), a lady in waiting to Queen Elizabeth II, she married Charles Robert Muir (d. 1972) at Oxford in 1953. Lord Charles George William Colin Spencer-Churchill (1940–2016), who married Gillian Spreckels Fuller (b. 1946), a great-granddaughter of California industrialist and financier John D. Spreckels, in 1965. They divorced in 1968 and in 1970, he married Elizabeth Jane Wyndham (b. 1948), a great-niece of the interior decorator Nancy Lancaster. Second marriage Six weeks before his death, on 26 January 1972, the Duke married his second wife, (Frances) Laura (née Charteris) Canfield (1915–1990), the widow of the American publishing heir Michael Temple Canfield (whose first wife had been Caroline Lee Bouvier, the sister of Jacqueline Kennedy Onassis). Laura Canfield was the second daughter of the Hon. Guy Lawrence Charteris (the second son of Hugo Charteris, 11th Earl of Wemyss and Lady Frances Lucy Tennant). Laura's older sister, Ann Geraldine Mary Charteris, was married to the novelist Ian Fleming. Laura herself was previously married to and divorced from Walter Long, 2nd Viscount Long and William Ward, 3rd Earl of Dudley. The Duke died at a hospital in London on 11 March 1972, and was succeeded by his son John Spencer-Churchill, Marquess of Blandford. He and his first wife are buried in the churchyard of St Martin's Church, Bladon. Descendants Through his eldest daughter, Lady Sarah (who inherited the bulk of his mother's estate upon her death in 1965), he was a grandfather of four: Serena Mary Churchill Russell (b. 1944) (who married Neil Balfour), Consuelo Sarah Russell (b. 1946), Alexandra Brenda Russell (b. 1949), and Jacqueline Russell (b. 1958). Through his second daughter, Lady Caroline, he was a grandfather of three: Michael Thomas Waterhouse (b. 1949), Elizabeth Ann Waterhouse (b. 1951) (who married Sir Richard Gervase