William Cavendish

William Cavendish MP (10 January 1783 – 14 January 1812) was an English nobleman and Whig politician. He was the son of Lord George Cavendish, later Earl of Burlington.

He was educated at Eton College, and Trinity College, Cambridge, between 1800 and 1803. He went on a continental Grand Tour in 1803–04, during which he visited Berlin to see the Prussian Army reviews. Although this was during the period of the Napoleonic Wars, his own military service was at home; he was commissioned Captain in the Derbyshire Militia in 1803, was promoted Major in 1804, and was its Colonel from 1811 until his early death.

He was elected MP for Knaresborough in May 1804, then for Aylesbury in July that year. In the next general election in 1806, he was elected for Derby, which he represented until his death. 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.