Pet form of John, also used as an independent given name from the 16th century onwards. In the United States it is occasionally also used as a girl's name. Famous bearers include the American country singer Johnny Cash (1932–2003) and the film actor Johnny Depp (b. 1963).
English: ostensibly an occupational name for a laborer, from Middle English work + man. According to a gloss cited by Reaney the term was used in the Middle Ages to denote an ambidextrous person, and the surname may also be a nickname in this sense.