John Duff (1701-1743) (1701–1743) Parents Catharine Duff Alexander Duff Children Alexander Duff of Davidson John Duff James Duff Catherine Duff William Duff Lachlan Duff Gordon, 8th of Park Siblings Katherine Duff Janet Duff Robert Duff, 4th of Drummuir James Duff Mary Duff Anne Duff Alexander Duff William Duff, 1st of Muirtown William Duff Partners Helen Gordon Mary Gordon