BiographyWilliam 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 at Picadilly in Devonshire House, London, Middlesex, England, United Kingdom of unspecified causes. He married Mary Butler (1646-1710) 26 October 1662 in County Tipperary, Ireland. Notable ancestors include William I of England (1027-1087), Charlemagne (747-814), Hugh Capet (c940-996), Alfred the Great (849-899), Rurik (c832-879), Henry II of England (1133-1189). Ancestors are from the United Kingdom, France, Germany, England, Russia, Ukraine, Spain, Portugal, Belgium, Israel, Hungary, Byzantium, Netherlands, Ireland, Belarus, the Byzantine Empire, Italy.
|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|| Rachel Russell (1674-1725)|
|Henry Cavendish (c1673-1700)|| |
|James Cavendish (c1675-1751)|