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), Alfred the Great (849-899). Ancestors are from the United Kingdom, the Netherlands, Ireland, France, England, Germany, Russia, Ukraine, Israel, Spain, Portugal, Belgium, Hungary, Italy, Turkey, the Byzantine Empire, Sweden, Belarus, Switzerland, the Czech Republic, Canaan.
Noteworthy descendants include
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