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Family name Kallen (カレン , Kallen
, 卡伦
) , around the world, is a common cognomen. The last name Kallen is characteristic of Suriname, where it is quite a common surname, Japan, where it is quite a rare surname, and Switzerland. Not in comparison with a country's population, the name is most common in Japan, Germany, and the United States. Very seldom, Kallen is the forename as well as the last name.