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Cognomen Коянаги (小柳 , Koyanagi , 畔柳 ) , all over the world, is quite a rare surname. The family name Коянаги is characteristic of Isle of Man, where it is quite a rare surname, Canada, where it is a rare surname, and Singapore. In absolute terms, the name is most common in China, the United States, and Japan. More prevalently, Коянаги is the forename as well as the last name.