Frederick Cavendish-Bentinck British JP (1856–1948) Parents Prudentia Penelope Leslie George Cavendish-Bentinck Children George Augustus Frederick Cavendish-Bentinck Lucy Joan Cavendish-Bentinck Victor Cavendish-Bentinck, 9th Duke of Portland Lady Barbara Cavendish-Bentinck Ferdinand Cavendish-Bentinck, 8th Duke of Portland Siblings Christina Anne Jessica Cavendish-Bentinck Venetia James William Cavendish-Bentinck Partners Ruth Cavendish Bentinck