When Jotham Merritt Manny was born on 28 September 1811, in Amsterdam, Montgomery, New York, United States, his father, Benjamin B. Manny, was 25 and his mother, Barbara De Graff, was 28. He married Mercy Card on 24 January 1854, in St. Louis, Missouri, United States. They were the parents of at least 1 son and 1 daughter. He lived in Illinois, United States in 1870. He died on 19 January 1898, in Santa Monica, Los Angeles, California, United States, at the age of 86, and was buried in Bellefontaine Cemetery, St. Louis, St. Louis, Missouri, United States.