Charles Douglas, 6th Marquess of Queensberry Scottish noble (1777–1837) Parents Grace Johnstone Sir William Douglas, 4th Baronet Children Lady Frances Caroline Douglas Lady Anne Georgina Douglas Lady Mary Elizabeth Douglas Lady Louisa Anne Douglas Lady Harriet Christian Douglas Lady Elizabeth Katrinka Douglas Lady Jane Margaret Mary Douglas Lady Caroline Elizabeth Douglas Siblings John Douglas, 7th Marquess of Queensberry Lord William Douglas unknown daughter Douglas Henry Alexander Douglas Lady Mary Douglas unknown daughter Douglas unknown daughter Douglas Partners Caroline Scott