Deborah Cavendish, Duchess of Devonshire Deborah Cavendish, Duchess of Devonshire Deborah Vivien Cavendish, Duchess of Devonshire, (born Deborah Freeman-Mitford and latterly Deborah, Dowager Duchess of Devonshire; 31 March 1920 – 24 September 2014) was an English aristocrat, writer, memoirist and socialite. She was the youngest and last surviving of the six Mitford sisters, who were prominent members of English society in the 1930s and 1940s. Known to her family as "Debo", Deborah Mitford was born in Asthall Manor, Oxfordshire, England. Her parents were David Freeman-Mitford, 2nd Baron Redesdale (1878–1958), son of Algernon Freeman-Mitford, 1st Baron Redesdale, and his wife, Sydney (1880–1963), daughter of Thomas Gibson
Mitford family Jessica became well-known writers: Nancy wrote "The Pursuit of Love" and "Love in a Cold Climate", and Jessica "The American Way of Death" (1963). Deborah managed one of the most successful stately homes in England, Chatsworth. Jessica and Deborah married nephews of prime ministers Winston Churchill and Harold Macmillan, respectively. Deborah and Diana both married wealthy aristocrats. Unity and Diana were well-known during the 1930s for being close to Adolf Hitler. Jessica turned her back on her inherited privileges and ran away to become a communist. Jessica's memoir, "Hons and Rebels", describes their upbringing, and Nancy obviously drew upon her