| Father | Col Jonathan Fitch (1727 - 1793) |
| Mother | Elisabeth Mary Mix (1746 - 1810) |
| Sibling | Samuel Mix Fitch (1767 - 1767) |
| Sibling | Samuel Mix Fitch (1768 - 1768) |
| Sibling | Jonathan Fitch (1769 - 1773) |
| Sibling | James Hillhouse Fitch (1771 - 1801) |
| Sibling | Jonathan Fitch (1773 - 1810) |
| Sibling | Thomas Fitch (1774 - 1822) |
| Sibling | Elizabeth Fitch (1776 - 1795) |
| Sibling | Samuel Fitch (1779 - 1813) |
| Sibling | William G. Fitch (1781 - 1851) |
| Sibling | Henry Fitch (1783 - 1815) |
| Sibling | David Cutler Fitch (1788 - 1819) |
| Sibling | Sarah Fitch (1790 - 1822) |