Joanna Leffingwell was born 28 October 1771 in Norwich, New London County, Connecticut, United States to Christopher Leffingwell (1734-1810) and Elizabeth Coit (1743-1796) and died 15 May 1851 of unspecified causes. She married Charles Lathrop (1770-1831) 21 April 1793 .
Children
| Name | Birth | Death | Joined with |
| Charles Christopher Lathrop (1794-1814) | |||
| Harriet Wadsworth Lathrop (1796-1833) | 9 April 1796 Norwich, New London County, Connecticut, United States | 14 January 1833 Oodooville, Sri Lanka | Miron Winslow (1789-1864) |
| Daniel Whiting Lathrop (1798-1833) | |||
| Frances Leffingwell Lathrop (1800-1863) | |||
| Christopher Leffingwell Lathrop (1804-1892) | 1 August 1804 Norwich, New London County, Connecticut, United States | 8 October 1892 Cleveland, Cuyahoga County, Ohio, United States | Philura Leffingwell Huntington (1805-1843) Deziah Branch Cushman (1808-1873) |
| Elizabeth Coit Lathrop (1813-) | |||
Siblings
| Name | Birth | Death | Joined with |
| William Leffingwell (1765-1834) | |||
| Elizabeth Leffingwell (1767-1830) | |||
| Lucretia Leffingwell (1770-) | |||
| Joanna Leffingwell (1771-1851) | 28 October 1771 Norwich, New London County, Connecticut, United States | 15 May 1851 | Charles Lathrop (1770-1831) |
| Lydia Leffingwell (1773-1809) | 6 May 1773 Norwich, New London County, Connecticut, United States | 6 March 1809 | John Whiting (1764-1844) |
| Christopher Leffingwell (1775-1860) | |||
| Daniel Leffingwell (1779-1804) | |||
| Jerusha Leffingwell (1782-1814) | |||
| Fanny Leffingwell (1783-1804) | |||