| Father | John Cogswell (1759 - 1801) |
| Mother | Elizabeth "Betty" Griffin (1759 - 1836) |
| Sibling | James Bartlet Cogswell (1784 - 1866) |
| Sibling | Sally Cogswell (1786 - 1826) |
| Sibling | Priscilla Cogswell (1788 - 1800) |
| Sibling | Betsey Cogswell (1789 - 1814) |
| Sibling | Robert Cogswell (1791 - 1852) |
| Sibling | Ebenezer Cogswell (1793 - 1795) |
| Sibling | Abigail "Nabby" Cogswell (1794 - 1796) |
| Sibling | Abigail White Cogswell (1796 - 1805) |
| Sibling | Hannah Cogswell (1797 - 1824) |
| Sibling | John Cogswell (1799 - 1892) |
| Sibling | Child premature Cogswell (1800 - 1800) |