People William Cavendish, Marquess of Hartington English politician and soldier (1917-1944)10 December 1917 – 9 September 1944 Edward Cavendish, 10th Duke of Devonshire6 May 1895 – 26 November 1950Mary Cavendish, Duchess of Devonshire29 July 1895 – 24 December 1988 William Cavendish, Marquess of Hartington10 December 1917 – 9 September 1944Kathleen Cavendish20 February 1920 – 13 May 1948 ParentsEdward Cavendish, 10th Duke of Devonshire6 May 1895 – 26 November 1950Mary Cavendish, Duchess of Devonshire29 July 1895 – 24 December 1988Spouses and partnersKathleen Cavendish20 February 1920 – 13 May 1948SiblingsAndrew Cavendish, 11th Duke of Devonshire2 January 1920 – 3 May 2004EElizabeth Cavendish24 April 1926 – 15 September 2018AAnne Tree6 November 1927 – 9 August 2010 From Wikipedia and Wikidata (public domain), updated daily.
