Margaret Cavendish Harley was born 11 February 1715 in Welbeck Abbey, Nottinghamshire, England, United Kingdom to Edward Harley, 2nd Earl of Oxford and Earl Mortimer (1689-1741) and Henrietta Cavendish Holles (1694-1755) and died 17 July 1785 in Bulstrode, Buckinghamshire, England, United Kingdom of unspecified causes. She married William Bentinck, 2nd Duke of Portland (1709-1762) 11 July 1734 at Oxford Chapel in Marylebone, Middlesex, England, United Kingdom. Notable ancestors include Henry II of England (1133-1189), William I of England (1027-1087), Charlemagne (747-814), Hugh Capet (c940-996), Alfred the Great (849-899). Ancestors are from the United Kingdom, France, England, Germany, Russia, Ukraine, Belgium, Spain, Portugal, Hungary, the Netherlands, Israel, Ireland, Italy, Turkey, the Byzantine Empire, Sweden, Belarus, Switzerland.


Offspring of William Bentinck, 2nd Duke of Portland and Margaret Cavendish Harley (1715-1785)
Name Birth Death Joined with
Elizabeth Cavendish-Bentinck (1735-1825) 27 July 1735 12 December 1825 Lower Grosvenor Street, London, Greater London, England, United Kingdom Thomas Thynne, 1st Marquess of Bath (1734-1796)

Henrietta Cavendish-Bentinck (1737-1827) 8 February 1737 4 June 1827 George Harry Grey, 5th Earl of Stamford (1737-1819)

William Henry Bentinck, 3rd Duke of Portland (1738-1809) 14 April 1738 Welbeck Abbey, Nottinghamshire, England, United Kingdom 30 October 1809 Bulstrode Park, Buckinghamshire, England, United Kingdom Dorothy Cavendish (1750-1794)

Margaret Bentinck (1739-1756)
Frances Bentinck (1741-1743)
Edward Charles Bentinck (1744-1819)

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