Duke of Devonshire a separate title from that of Earl of Devon, which still belongs to the Courtenay family. The fifth Duke and Duchess of Devonshire are portrayed in the 2008 film "The Duchess" directed by Saul Dibb. The film is based on Amanda Foreman's biography of the scandalous 18th-century English aristocrat Georgiana Cavendish, Duchess of Devonshire (portrayed by Keira Knightley) and her relationship with the Duke (Ralph Fiennes) and his next wife, Lady Elizabeth Foster. Along with Jane Austen, the fifth Duke and his second wife appear, soon after Georgiana's death, in "Jane and the Stillroom Maid", a murder mystery by Stephanie
Deborah Cavendish, Duchess of Devonshire Bowles, MP. She married Lord Andrew Cavendish, younger son of the 10th Duke of Devonshire, in 1941. When Cavendish's older brother, William, Marquess of Hartington, was killed in action in 1944, Cavendish became heir to the dukedom and began to use the courtesy title Marquess of Hartington. In 1950, on the death of his father, the Marquess of Hartington became the 11th Duke of Devonshire. The Duchess was the main public face of Chatsworth for many decades. She wrote several books about Chatsworth, and played a key role in the restoration of the house, the enhancement of the garden and