When John Zepheniah Swallow was born on 7 May 1748, in Kent, Delaware, United States, his father, Zepheniah Swallow, was 28 and his mother, Mrs. Charity Swallow, was 28. He married Mary Ann Greene in 1769, in Fauquier, Virginia, United States. They were the parents of at least 6 sons and 4 daughters. He lived in Fauquier, Virginia, United States in 1830. He died on 23 November 1830, in Butler Township, Montgomery, Ohio, United States, at the age of 82, and was buried in Montgomery, Ohio, United States.