সম্পর্কসন্তানDuncan Farquharson Gregory (1813–1844)সৎ ভাই-বোনDorothea Gregory (1754–1830)Anna Margaretta Gregory (1760–1825)James Gregory (1753–1821)William Gregory (1759–1803)John Gregory (1761–1783)বাবা-মাElizabeth Forbes (1730–1761)