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Surname Hallen (Hallen , هالين , 哈伦 ) , around the world, is quite a rare last name. The family name Hallen is characteristic of Northern Europe, particularly Norway, where it is quite a rare surname, Sweden, and Denmark. Measured by absolute frequency, this name is the most popular in the United States, Germany, and Sweden. Much less frequently, Hallen is the forename as well as the last name.