The Earl of Devonshire | |
|---|---|
 1631 portrait painting of William Cavendish by Cornelis Janssens van Ceulen | |
| Born | 10 October 1617 |
| Died | 23 November 1684 |
| Spouse | Elizabeth Cavendish, Countess of Devonshire |
| Children | William Cavendish, 1st Duke of Devonshire Charles Cavendish Lady Anne Cavendish |
| Parent(s) | William Cavendish, 2nd Earl of Devonshire Christian Cavendish, Countess of Devonshire |
William Cavendish, 3rd Earl of Devonshire, KB, FRS (c. 10 October 1617 – 23 November 1684) was an English nobleman and politician, known as a royalist supporter.