Charles Horace Mayo, American surgeon, founded the Mayo Clinic (d. 1939)

Charles Horace Mayo (July 19, 1865 – May 26, 1939) was an American medical practitioner and was one of the founders of the Mayo Clinic along with his brother William James Mayo, Augustus Stinchfield, Christopher Graham, E. Star Judd, Henry Stanley Plummer, Melvin Millet, and Donald Balfour.