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Surname Kokan (Kokan , Кокан , กอกัน ) , in the entire world, is a common cognomen. The family name Kokan is habitual in Japan, where it is quite a common surname, Croatia, where it is quite a rare surname, and North Macedonia. Not in comparison with a country's population, it is commonest in Japan, India, and Croatia. Much less frequently, Kokan is the forename as well as the last name.