William Cavendish, 1st Duke of Devonshire

His Grace The Duke of Devonshire KG PC FRS
Portrait by Godfrey Kneller
Lord Steward of the Household
In office 1689–1707
Preceded by	The Duke of Ormond
Succeeded by	William Cavendish, 2nd Duke of Devonshire
Lord High Steward for the Coronation of Queen Anne
In office 22 April 1702 – 23 April 1702
Preceded by	The Baron Somers
Succeeded by	The Duke of Grafton
Personal details
Born	(1640-01-25)25 January 1640
Died	18 August 1707(1707-08-18) (aged 67)
Spouse	Lady Mary Butler (m. 1662)
Children	Lady Elizabeth Cavendish William Cavendish, 2nd Duke of Devonshire Lord Henry Cavendish Lord James Cavendish
Parent(s)	William Cavendish, 3rd Earl of Devonshire Elizabeth Cavendish, Countess of Devonshire

William Cavendish, 1st Duke of Devonshire, KG, PC, FRS (25 January 1640 – 18 August 1707) was an English Army officer, Whig politician and peer who sat in the House of Commons from 1661 until 1684 when he inherited his father's peerage as Earl of Devonshire and took his seat in the House of Lords. Cavendish was part of the "Immortal Seven" which invited William of Orange to depose James II of England as part of the Glorious Revolution, and was rewarded for his efforts by being elevated to the Duke of Devonshire in 1694.