George Augustus Frederick Cavendish-Bentinck (1891-1892) (1891–1892) Parents Ruth Cavendish Bentinck Frederick Cavendish-Bentinck Children Siblings Lady Barbara Cavendish-Bentinck Victor Cavendish-Bentinck, 9th Duke of Portland Lucy Joan Cavendish-Bentinck Ferdinand Cavendish-Bentinck, 8th Duke of Portland