Lord Edward Bentinck British politician (1744–1819) Parents Margaret Cavendish Bentinck, Duchess of Portland William Bentinck, 2nd Duke of Portland Children Cavendish Charles Cavendish-Bentinck Harriet Cavendish-Bentinck William Harry Edward Bentinck Charlotte Georgiana Sophia Cavendish-Bentinck Siblings William Cavendish-Bentinck, 3rd Duke of Portland Elizabeth Bentinck Lady Henrietta Cavendish-Bentinck Partners Elizabeth Cumberland