William Cavendish (1783-1812)

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For other persons named William Cavendish, see William Cavendish (disambiguation).

William Cavendish (10 January 1783 – 15 January 1812) was an English politician, the son of Lord George Cavendish, later Earl of Burlington.

He married Louisa O'Callaghan (d. 1863), daughter of Cornelius O'Callaghan, 1st Baron Lismore, on 18 July 1807. They had four children:

Lady Fanny Cavendish (d. December 30, 1885), married Frederick John Howard and had issue
William Cavendish, 7th Duke of Devonshire (1808–1891)
Lord George Henry Cavendish (August 19, 1810 – September 23, 1880)
Lord Richard Cavendish (July 3, 1812 – November 19, 1873)

(Upon William's accession as Duke of Devonshire in 1858, his siblings were granted precedence of the children of a duke by Royal Warrant.)

William predeceased his father in 1812; his father was subsequently created Earl of Burlington in 1831, a title which passed to William's son William, who also succeeded as Duke of Devonshire.

Preceded by James Du Pre Robert Bent	Member for Aylesbury with James Du Pre 1804–1806	Succeeded by Sir George Nugent, Bt George Henry Compton Cavendish
Preceded by Edward Coke George Walpole	Member for Derby with Edward Coke 1806–1807 & 1807–1812, Thomas Coke 1807 1806–1812	Succeeded by Edward Coke Henry Frederick Compton Cavendish