BiographyWilliam Charles Augustus Cavendish-Bentinck was born 3 October 1780 in Welbeck Abbey, Nottinghamshire, England, United Kingdom to William Henry Bentinck, 3rd Duke of Portland (1738-1809) and Dorothy Cavendish (1750-1794) and died 28 April 1826 of unspecified causes. He married Georgiana Augusta Frederica Seymour (c1787-1813) 21 September 1808 . He married Anne Wellesley (c1788-1875) 23 July 1816 at St Martin in Westminster, 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, Netherlands, Ireland, France, England, Germany, Russia, Ukraine, Israel, Spain, Portugal, Belgium, Byzantium, Hungary, Belarus, the Byzantine Empire, Italy.
Noteworthy descendants include