Thomas Howard DuVal (November 4, 1813 – October 10, 1880) was a United States federal judge in the 19th century.DuVal was born in Buckingham County, Virginia, and graduated from St. Joseph's College, Bardstown, Kentucky, in 1833. He read law in 1837 and went into private practice in Tallahassee, Florida, from 1837 to 1841. He was a Court of Appeals Clerk for Leon County, Florida, from 1841 to 1843 and then became U.S.