Hall, G. Stanley Hall, Granville Stanley Hall -- (United States child psychologist whose theories of child psychology strongly influenced educational psychology (1844-1924))
Hall, Charles Martin Hall -- (United States chemist who developed an economical method of producing aluminum from bauxite (1863-1914))
Hall, Charles Francis Hall -- (United States explorer who led three expeditions to the Arctic (1821-1871))
Hall, Asaph Hall -- (United States astronomer who discovered Phobos and Deimos (the two satellites of Mars) (1829-1907))