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
Catherine Cavendish, Duchess of Devonshire duke died in 1755 and was succeeded by their eldest son, William, to whose marriage to the exceptionally wealthy Lady Charlotte Boyle Catherine was bitterly opposed. However, at her husband’s death, since Charlotte had died the previous year and the young duke did not remarry, Catherine remained mistress of Chatsworth until her grandson, the 5th Duke, married 17-year-old Georgiana Spencer in 1774. Catherine Cavendish, Duchess of Devonshire Catherine Cavendish, Duchess of Devonshire (1700 – 8 May 1777), formerly Catherine Hoskins (or Hoskyn), was the wife of William Cavendish, 3rd Duke of Devonshire, and mother of the 4th Duke. She was