| Father | Moses Clack Sr. (1719 - 1790) |
| Mother | Susannah H. Thomasson (1728 - 1833) |
| Sibling | Moses Clack Jr. (1754 - 1842) |
| Sibling | Mildred "Milly" Clack (1759 - 1827) |
| Sibling | George Clark (1760 - ) |
| Sibling | Benjamin Clack (1762 - 1852) |
| Sibling | Charles Clack (1763 - 1792) |
| Sibling | Zachariah Clack (1764 - 1852) |
| Sibling | Samuel Clack (1765 - 1842) |
| Sibling | Thomas Clack (1766 - 1820) |
| Sibling | Sarah Clack (1767 - 1833) |
| Sibling | Judith Clack (1767 - 1853) |
| Sibling | Susannah Clack (1768 - 1850) |
| Sibling | Thompson Clark (1770 - ) |
| Sibling | John Clark (1774 - 1852) |