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
Nancy Mitford house was built on land nearby. The family stayed in Asthall Manor for seven years, and it became the basis of many of the family scenes which Nancy was later to portray in her semi-autobiographical novels. Growing up proved a difficult process for Nancy. Unable to form a relationship with Pamela, the sister nearest to her in age, she was bored and irritated by her younger siblings, and vented her feelings by teasing and tormenting them. Although there was undoubtedly cruelty in her taunting—the other children, led by Tom, formed a "Leag (sic) against Nancy"—her teasing was also, according to