The first synonym for the name "Carl" is "Charles" or "Charlie". Other options include "Carlo", "Karl", "Karlson", "Carles", "Carlin", and "Karol". These names all derive from the Germanic name "Karl", meaning "man" or "free man". Interestingly, "Carl" is also a word in Swedish and Norwegian meaning "song" or "melody". The name "Carl" has been popular throughout history, with notable figures such as Carl Jung, Carl Sagan, and Carl Bernstein sharing the name. Some famous characters in media with the name "Carl" include Carl Grimes from "The Walking Dead" and Carl Carlson from "The Simpsons".