Surname カーレン (Karlen 
, カーレン 
) , globally, is quite a rare family name. The cognomen カーレン is habitual in Switzerland, where it is quite a common surname, Georgia, where it is quite a rare surname, and Sweden. In absolute terms, it is the most numerous in Switzerland, the United States, and Argentina. Likewise, カーレン is the forename as well as the last name.