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Cognomen Aino (Айна , Aino , アイノ ) , around the world, is a common last name. The surname Aino is characteristic of Kyrgyzstan, where it is quite a common surname, Japan, where it is quite a rare surname, and Turkmenistan. Measured by absolute frequency, this name is the most popular in Japan, Nigeria, and Kyrgyzstan. Likewise, Aino is the forename as well as the last name.