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In the world, Isu (Isu , 椅子 , Ису ) is quite a common epicene first name. The forename Isu is characteristic of Nigeria, where it is quite a rare epicene name, Sri Lanka, where it is quite a rare boy's name, and India, where it is a rare dominantly boy's, but seldom girly name. Likewise, Isu is the last name as well as the forename.