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BiographyDorothy Cavendish was born 27 August 1750 to William Cavendish, 4th Duke of Devonshire (1720-1764) and Charlotte Elizabeth Boyle, 6th Baroness Clifford (1731-1754) and died 3 June 1794 in Burlington House, Piccadilly, Greater London, England, United Kingdom of mortification of the bowels. She married William Henry Bentinck, 3rd Duke of Portland (1738-1809) 8 November 1766 in Burlington House, London, Greater London, England. Notable ancestors include Charlemagne (747-814), William I of England (1027-1087), Hugh Capet (c940-996), Alfred the Great (849-899), Henry II of England (1133-1189). Ancestors are from the United Kingdom, France, Germany, England, Russia, Ukraine, Spain, Portugal, Belgium, Ireland, Israel, Hungary, the Netherlands, Italy, Turkey, the Byzantine Empire, Sweden, the United States, Belarus.
|Offspring of William Henry Bentinck, 3rd Duke of Portland and Dorothy Cavendish (1750-1794)|
|William Henry Cavendish-Bentinck, 4th Duke of Portland (1768-1854)||24 June 1768 Welbeck Abbey, Nottinghamshire, England, United Kingdom||27 March 1854 Welbeck Abbey, Nottinghamshire, England, United Kingdom|| Henrietta Scott (1774-1844)|
|William Henry Cavendish-Bentinck (1774-1839)|| |
|Charlotte Cavendish-Bentinck (1775-1862)||3 October 1775||28 July 1862|| Charles Greville (1762-1832)|
|Mary Cavendish-Bentinck (1778-)|| |
|William Charles Augustus Cavendish-Bentinck (1780-1826)||3 October 1780 Welbeck Abbey, Nottinghamshire, England, United Kingdom||28 April 1826|| Georgiana Augusta Frederica Seymour (c1787-1813)|
Anne Wellesley (c1788-1875)
|Frederick Cavendish-Bentinck (1781-1828)|
Common ancestors of Dorothy Cavendish (1750-1794) and William Henry Bentinck, 3rd Duke of Portland (1738-1809)
- Baptist Noel, 3rd Viscount Campden (c1611-1682)
- Hester Wotton (1615-aft1646)
- Thomas Wriothesley, 4th Earl of Southampton (1607-1667)
Noteworthy descendants include