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All around the world, Ниссен (Nissen , Nyssen , Niessen ) is a rare unisex first name. The given name Ниссен is characteristic of Belgium, where it is a rare gender-neutral name, Greece, where it is a rare masculine name, and Tanzania, where it is a very rare boy's name. Measured by absolute frequency, this name is the most popular in Belgium, the United States, and Tanzania. Much more frequently, Ниссен is the last name as well as the forename.