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Surname Koyano (敦 , Koyano , Кояно ) , globally, is quite a common cognomen. The last name Koyano is characteristic of China, where it is a rare surname, Japan, where it is a very rare surname, and Peru. Measured by absolute frequency, the name is most common in China, Japan, and the United States. Also, Koyano is the forename as well as the last name.