BiographyWilliam Henry Bentinck, 3rd Duke of Portland was born 14 April 1738 at Portland in Welbeck Abbey, Nottinghamshire, England, United Kingdom to William Bentinck, 2nd Duke of Portland (1709-1762) and Margaret Cavendish Harley (1715-1785) and died 30 October 1809 in Bulstrode Park, Buckinghamshire, England, United Kingdom of unspecified causes. He married Dorothy Cavendish (1750-1794) 8 November 1766 in Burlington House, London, England, United Kingdom. Notable ancestors include Charlemagne (747-814), Henry II of England (1133-1189), William I of England (1027-1087), Hugh Capet (c940-996), Rurik (c832-879), Alfred the Great (849-899). Ancestors are from the United Kingdom, the Netherlands, France, England, Germany, Russia, Ukraine, Israel, Spain, Portugal, Belgium, Hungary, Ireland, Belarus, Italy, Turkey, the Byzantine Empire.
Common ancestors of William Henry Bentinck, 3rd Duke of Portland (1738-1809) and Dorothy Cavendish (1750-1794)
- Baptist Noel, 3rd Viscount Campden (c1611-1682)
- Hester Wotton (1615-aft1646)
- Thomas Wriothesley, 4th Earl of Southampton (1607-1667)
Noteworthy descendants include