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Cognomen Kalen (Kalen , Кален , كالين ) , around the globe, is quite a common last name. The surname Kalen is habitual in Kyrgyzstan, where it is quite a rare surname, Sweden, and Finland, where it is a rare surname. In absolute terms, it most frequently occurs in India, the United States, and Malaysia. Likewise, Kalen is the forename as well as the last name.