Globally, カーレン (Karlen 
, カーレン 
) is quite a rare gender-neutral forename. The first name カーレン is characteristic of Georgia, where it is quite a common boy's name, Armenia, where it is quite a rare masculine name, and Bolivia, where it is a rare girly name. Measured by absolute frequency, this name is the most popular in Georgia, the United States, and Brazil. Also, カーレン is the last name as well as the forename.