रिश्तेबच्चेDuncan Farquharson Gregory (1813–1844)सौतेले भाई-बहनDorothea Gregory (1754–1830)Anna Margaretta Gregory (1760–1825)James Gregory (1753–1821)William Gregory (1759–1803)John Gregory (1761–1783)माता-पिताElizabeth Forbes (1730–1761)