Catherine Duff (1732-1803) (1732–1803) Parents John Duff Helen Gordon Children George Morison Theodore Morison, 5th of Bognie John Morison, 6th of Bognie Katherine Morison James Morison Siblings Alexander Duff of Davidson Lachlan Duff Gordon, 8th of Park John Duff William Duff James Duff Partners Alexander Morison, 4th of Bognie