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Throughout the world, Nissen (ניסן , Nissen , 尼森 ) is a rare unisex forename. The forename Nissen is habitual in Israel, where it is a rare masculine name, Greece, and Tanzania, where it is a very rare boy's name. Measured by absolute frequency, the name is most common in the United States, Israel, and Tanzania. More prevalently, Nissen is the last name as well as the forename.