William Cavendish, 5th Duke of Devonshire
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His Grace The Duke of Devonshire KG |
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William Cavendish, 5th Duke of Devonshire, painted in Rome by Pompeo Batoni, 1768
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| Lord High Treasurer of Ireland | |
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In office 13 March 1766 – 1793 |
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| Monarch | George III |
| Preceded by |
Vacant William Cavendish, 4th Duke of Devonshire, 1764 |
| Succeeded by |
In Commission Richard Boyle, 2nd Earl of Shannon, First Lord |
| Personal details | |
| Born | 14 December 1748 |
| Died | 29 July 1811 (aged 62) |
| Spouse(s) |
Lady Georgiana Spencer (m. 1774–1806; her death) Lady Elizabeth Foster (m. 1809–11; his death) |
| Children |
William George Spencer Cavendish, 6th Duke of Devonshire Georgiana Howard, Countess of Carlisle Harriet Leveson-Gower, Countess Granville Charlotte Williams Sir Augustus Clifford, 1st Baronet Caroline St. Jules |
| Parents |
William Cavendish, 4th Duke of Devonshire Lady Charlotte Boyle |
William Cavendish, 5th Duke of Devonshire, KG (14 December 1748 – 29 July 1811), was a British aristocrat and politician. He was the eldest son of William Cavendish, 4th Duke of Devonshire by his wife the heiress Lady Charlotte Boyle, suo jure Baroness Clifford, who brought in considerable money and estates to the Cavendish family. He was invited to join the Cabinet on three occasions, but declined each offer. He was Lord High Treasurer of Ireland and Governor of Cork, and Lord Lieutenant of Derbyshire. The 5th Duke is best known for his first wife Georgiana, Duchess of Devonshire. At the age of about twenty, Devonshire toured Italy with William Fitzherbert which is where they commissioned the pair of portraits by Pompeo Batoni.
He was married twice: first, to Lady Georgiana Spencer (1757-1806) daughter of John Spencer, 1st Earl Spencer; 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.
By his first wife, he had one son (William Cavendish, 6th Duke of Devonshire, sometimes called "The Bachelor Duke", who succeeded him and who died unmarried in 1858), and two daughters: Lady Georgiana "Little G" Cavendish, later the Countess of Carlisle (wife of George Howard, 6th Earl of Carlisle), and Lady Harriet "Harryo" Cavendish, later the Countess Granville (wife of Lord Granville Leveson-Gower, who was created 1st Earl Granville). Both daughters left descendants. The title of Baron Clifford fell into abeyance between them, and the present Earl of Carlisle and the present Earl Granville have inherited their titles from Georgiana and Harriet respectively. The dukedom and estates passed eventually to a grandson of a younger brother of the 5th Duke of Devonshire; however, the 7th Duke of Devonshire eventually married a daughter of the 6th Earl of Carlisle, who was thus a granddaughter of the 5th Duke and niece of the 6th Duke.
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