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Cognomen Kumon (Kumon , Кумон , كومون) , across the world, is a rare last name. The cognomen Kumon is habitual in Kyrgyzstan, where it is a rare surname, Poland, where it is a very rare surname, and Thailand. Measured by absolute frequency, it most frequently occurs in Indonesia, Japan, and Thailand. Also, Kumon is the forename as well as the last name.