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Last name Кузин (Kusin , Kuzin , Кузин ) , all around the world, is a common family name. The family name Кузин is characteristic of Russia, where it is quite a common surname, Belarus, where it is quite a rare surname, and Estonia. In absolute terms, it is the most numerous in Russia, Kazakhstan, and Philippines. Much less frequently, Кузин is the forename as well as the last name.