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
Georgiana Howard, Countess of Carlisle Georgiana Howard, Countess of Carlisle Georgiana Dorothy Howard, Countess of Carlisle ("née" Cavendish; 12 July 1783 – 8 August 1858) was a British noblewoman. She was born after nine years of childless marriage between William Cavendish, 5th Duke of Devonshire and his wife Lady Georgiana Spencer, the political hostess and socialite. As such, she was a member of one of the country's grandest and richest families. In 1801, the young Georgiana married George Howard, Viscount Morpeth, later becoming Countess of Carlisle upon her husband's accession in 1825. Their twelve children included the 7th and 8th Earls of Carlisle. Another child,