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Cognomen 小林 (小林 , Hideo , Kobayashi ) , across the world, is a common last name. The last name 小林 is habitual in Japan, where it is quite a common surname, Hong Kong, where it is quite a rare surname, and Singapore. Measured by absolute frequency, this name is the most popular in China, Japan, and Brazil. More frequently, 小林 is the forename as well as the last name.