When Jedediah Leavens Jr was born on 27 March 1803, in Killingly, Windham, Connecticut, United States, his father, Jedediah Leavens, was 47 and his mother, Patience Whitaker, was 33. He married Frances Josephine Hammond on 15 January 1833, in Hampton, Windham, Connecticut, United States. They were the parents of at least 3 sons and 4 daughters. He died on 9 July 1868, in Norwich, New London, Connecticut, United States, at the age of 65, and was buried in Yantic Cemetery, Norwich, New London, Connecticut, United States.