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All over the world, 성민 (성민 , Seongmin , Seong-Min ) is quite a common predominantly masculine, but scarcely female first name. The first name 성민 is characteristic of South Korea, where it is quite a common primarily masculine, but scarcely feminine name, and the United States, where it is an extremely rare gender-neutral name. Much less frequently, 성민 is the last name as well as the forename.