Arnold is a German and English surname. Notable people with the surname include: A. Otis Arnold (1878–1941), American businessman and politician Alice Arnold (disambiguation), several people Ann Arnold (1936–2015), English artist Anthony Arnold (1896–1954), British flying ace Augusta Foote Arnold (1844–1904) American naturalist and author Bené Arnold (1935–2024), American dance scholar Benedict Arnold (disambiguation), several people Benedict Arnold (1741–1801), American Revolution general, de…