Caroline St. Jules married the Hon. George Lamb, a brother of the 2nd Viscount Melbourne (himself married to Lady Caroline Ponsonby, niece of Lady Georgiana Spencer, the 5th Duke's 1st wife).
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He was married twice: first, to Lady Georgiana Spencer (1757–1806); second, to Lady Elizabeth Foster, née Hervey (1759–1824), daughter of the 4th Earl of Bristol, who had been his mistress and his first wife's friend and confidante for more than twenty years.
Born in Paris, France, Devonshire was the son of William Cavendish, 5th Duke of Devonshire, and Lady Georgiana, daughter of John Spencer, 1st Earl Spencer.
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Catherine, Duchess of Cambridge | Sarah, Duchess of York | Camilla, Duchess of Cornwall | Marie Louise, Duchess of Parma | Princess Louise, Duchess of Argyll | Duchess of Cambridge | Devonshire Parish | Duke of Devonshire | Cavendish Laboratory | Sarah Lennox, Duchess of Richmond and Lennox | Duchess of York | Lord Frederick Cavendish | Duchess of Kent | Devonshire Regiment | Maria Teresa, Grand Duchess of Luxembourg | Duchess of Cornwall | Duchess Charlotte Georgine of Mecklenburg-Strelitz | Catherine of Brunswick-Wolfenbüttel, Duchess of Saxe-Lauenburg | William Cavendish-Bentinck, 3rd Duke of Portland | Princess Madeleine, Duchess of Hälsingland and Gästrikland | Princess Alice, Duchess of Gloucester | Natalia Grosvenor, Duchess of Westminster | Maria Vladimirovna, Grand Duchess of Russia | Henry Cavendish | Georgiana Cavendish, Duchess of Devonshire | William Cavendish, 6th Duke of Devonshire | Thomas Cavendish | Duchess Theatre | Duchess of Gloucester | Cavendish Square |
It has been speculated that The Sylph was written by Sophia Briscoe.
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The film, directed by Saul Dibb, is based on the biography Georgiana, Duchess of Devonshire by Amanda Foreman.
The Duchess of Devonshire is the president of the Trust.
The first was Maximian, dedicated to William Lock; the second was Theodora, dedicated by permission to Georgiana Cavendish, Duchess of Devonshire.