Lord Charles Bentinck British politician (1780-1826) (1780–1826) Parents Dorothy Bentinck, Duchess of Portland William Cavendish-Bentinck, 3rd Duke of Portland Children unknown daughter Cavendish-Bentinck Charles Cavendish-Bentinck Anne Hyacinthe Cavendish-Bentinck Arthur Cavendish-Bentinck Georgina Cavendish-Bentinck Emily Cavendish-Bentinck Siblings Frederick Cavendish-Bentinck Charlotte Cavendish-Bentinck William Bentinck, 4th Duke of Portland Lord William Bentinck Partners Anne Wellesley Georgiana Augusta Frederica Seymour