William Cavendish, 1st Duke of Devonshire, Duke of Devonshire, Marquis of Hartington, Earl of Devonshire, was born 25 January 1640 to William Cavendish, 3rd Earl of Devonshire (1617-1684) and Elizabeth Cecil (1619-1689) and died 18 August 1707 Picadilly Devonshire House, London, Greater London, England, United Kingdom of unspecified causes. He married Mary Butler (1646-1710) 26 October 1662 in County Tipperary, Ireland.
|Offspring of William Cavendish, 1st Duke of Devonshire and Mary Butler (1646-1710)|
|Elizabeth Cavendish (c1670-1741)|
|William Cavendish, 2nd Duke of Devonshire (1672-1729)||1672||4 June 1729 London, Greater London, England, United Kingdom||Rachel Russell (1674-1725)|
|Henry Cavendish (c1673-1700)|
|James Cavendish (c1675-1751)|