Leo is a given name in several languages. In European languages, it is usually a masculine given name and it comes from the Latin word leo, which in turn comes from the Greek word λέων meaning "lion". It can also be used as a short form of other names that begin with Leo-, such as Leonard, Leonardo, Leonidas or Leopold. In Japanese, Leo or Reo (怜央) is usually a masculine given name.
The name can refer to: