Guy

Guy is an old French form of Wido, a Germanic name traditionally associated with wood or woodland. The Normans brought the name to England, where it developed a history independent of its French pronunciation. The same three letters can therefore represent the familiar English guy sound or the French gee sound.

The name also appears in literary history, including Walter Scott’s Guy Mannering. Its status as an established personal name predates the ordinary English use of guy to mean a man or person. Guido belongs to the same broader name family, but Guy already functions as a complete given name rather than requiring Guido as a formal expansion.