| Father | Samuel Cogswell (1713 - 1790) |
| Mother | Mary Langdon (1716 - 1763) |
| Sibling | Jerusha Cogswell (1761 - 1841) |
| Sibling | Son Cogswell (1735 - 1735) |
| Sibling | Isaac Cogswell (1736 - 1736) |
| Sibling | Lucerna Cogswell (1737 - 1738) |
| Sibling | Joseph Cogswell (1737 - 1781) |
| Sibling | Mary Cogswell (1739 - ) |
| Sibling | Asahel Cogswell (1740 - 1792) |
| Sibling | Rhoda Cogswell (1743 - 1826) |
| Sibling | Rachael Cogswell (1749 - 1831) |
| Sibling | Lydia Cogswell (1752 - 1838) |
| Sibling | Samuel Cogswell (1754 - 1815) |
| Sibling | Reuben Cogswell (1756 - 1837) |
| Sibling | Simeon Cogswell (1759 - 1759) |
| Sibling | Levi Cogswell (1759 - 1853) |
| Sibling | Electa Cogswell (1763 - ) |