|Birthplace:||Saybrook, Middlesex, Connecticut|
Son of Lt. Thomas Leffingwell Sr. and Mary "Singing Lark" White Leffingwell
|Managed by:||Private User|
About Joseph Leffingwell
Thomas and Mary had five sons and two daughters. Two of the sons, Jonathan and Joseph, disappeared without trace.
- Albert Leffingwell and Charles Wesley Leffingwell, The Leffingwell Record, 1897