Thomas Benton Hagan ("Benton") was born in Frederick, Maryland, on November 27, 1876, the son of John C. and Catherine Hagan. He had seven siblings: Marshall, Clarence, John Thurston, Clara, Eugene, Marian, and Ralph. Between 1907 and 1910, he worked as a laborer in the Canal Zone. On at least one occasion, he served as acting foreman. Hagan later moved to Washington, D.C., where he worked as a machinist in the Navy Yard. He married a woman named Agnes between 1920 and 1930. Thomas Benton Hagan died in Baltimore, Maryland, on March 7, 1944. His sister, Clara Hagan, married Charles B. Payne. They lived in Baltimore with their children, Eugene, Ralph, James, and Catherine.