Leo is often used as a nickname for Leonardo, Leon, and Leopold.
One of the most famous actors is Leonardo DiCaprio, from many movies, including Titanic. Authors include Leo Tolstoy and Leo Rosten. Gerard Hugh "Leo" Sayer is an Australian musician, famous for many songs, including When I Need You.
There were 13 popes named Leo. Athletes named Leo include skateboarder Leo Baker and speedskater Leo Visser.
Fictional characters named Leo include Leo Getz from Lethal Weapon, Leo McGary from the television series The West Wing , and Leo Jones from Dr. Who.