Margaret Cavendish Bentinck, Duchess of Portland was the richest woman in Great Britain of her time, styled Lady Margaret Harley before 1734, Duchess of Portland from 1734 to her husband's death in 17
Margaret Cavendish Bentinck, Duchess of Portland by Christian Friedrich Zincke, 1738
Portrait c. 1744 by Thomas Hudson
William Henry Cavendish Cavendish-Bentinck, 3rd Duke of Portland was a British Whig and then a Tory politician during the late Georgian era. He served as chancellor of the University of Oxford and as
Margaret Bentinck, Duchess of Portland
…Lady Henrietta Bentinck (8 February 1737 – 4 June 1827), who married George Grey, 5th Earl of Stamford (1737–1819) William Henry Cavendish-Bentinck, 3rd Duke of Portland (14 April 1738 – 30 October 1809). Lady Margaret Bentinck (26 July 1739 – 28 April 1756…
Portrait by John Powell, c. 1782
3rd Duke of Portland, by Matthew Pratt, c. 1774
Lady Dorothy Cavendish, by George Romney, c. 1772
Memorial to the 3rd Duke of Portland at the family vault in St Marylebone Parish Church