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Last name Karlen (Карлен
, Karlen
, 卡伦
) , around the world, is quite a common surname. The surname Karlen is characteristic of Armenia, where it is a common surname, Switzerland, where it is quite a common surname, and Georgia, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Armenia, Switzerland, and the United States. Likewise, Karlen is the forename as well as the last name.