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All over the world, Айко (Aiko , Ayko , Айко ) is a common dominantly female, but seldom masculine forename. The first name Айко is habitual in Macao, where it is quite a common feminine name, Equatorial Guinea, where it is quite a rare feminine name, and Japan. In absolute terms, the name is most common in Japan, Philippines, and Indonesia. Very seldom, Айко is the last name as well as the forename.
Айко is also a name for the fictitious and mythical characters: Aiko , the Hunie character, HuniePop; Aiko Senoo , the Ojamajo Doremi character and Aiko Iwase , character in Bakuman.