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In all the world, 丹羽 (Niwa , 丹羽 , Danyu ) is quite a rare unisex forename. The first name 丹羽 is habitual in Indonesia, where it is a rare unisex name, Tanzania, where it is a very rare feminine name, and Morocco, where it is a very rare masculine name. Measured by absolute frequency, this name is the most popular in China, Indonesia, and India. Likewise, 丹羽 is the last name as well as the forename.