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Surname アイコ (Aiko , アイコ ) , in the entire world, is a common family name. The last name アイコ is characteristic of Japan, where it is quite a common surname, Trinidad and Tobago, where it is quite a rare surname, and Benin. In absolute terms, the name is most common in Japan, Indonesia, and Kenya. Likewise, アイコ is the forename as well as the last name.