Margaret Cavendish Bentinck, Duchess of Portland British aristocrat, naturalist, botanist, and collector (1715-1785) (1715–1785) Parents Henrietta Harley, Countess of Oxford and Countess Mortimer Edward Harley, 2nd Earl of Oxford and Earl Mortimer Children William Cavendish-Bentinck, 3rd Duke of Portland Lady Henrietta Cavendish-Bentinck Lord Edward Bentinck Elizabeth Bentinck Partners William Bentinck, 2nd Duke of Portland
