| Father | *John ("Jock") Duncan (1805 - 1896) |
| Mother | *Jacobina Scott (1809 - 1881) |
| Sibling | Janet (Dunlop) Duncan (1831 - ) |
| Sibling | Margaret Duncan (1832 - 1905) |
| Sibling | Agnes Duncan (1832 - ) |
| Sibling | Marion Duncan (1835 - 1908) |
| Sibling | Ellen (Helen) Duncan (1835 - 1881) |
| Sibling | Jean Duncan (1837 - ) |
| Sibling | James Duncan (1837 - ) |
| Sibling | Thomas Duncan (1838 - ) |
| Sibling | Jacobina ("Bina") Duncan (1839 - 1881) |
| Sibling | Christina Duncan (1841 - 1925) |
| Sibling | Jennett Duncan (1842 - ) |
| Sibling | Isabella Duncan (1844 - ) |
| Sibling | *John Duncan (1847 - ) |
| Sibling | Thomas Duncan (1849 - ) |