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Cognomen Kaysin (Кайсин , Kaysin , Каысин ) , throughout the world, is quite a rare family name. The surname Kaysin is habitual in Kazakhstan, where it is quite a rare surname, Azerbaijan, and Estonia, where it is a rare surname. In absolute terms, this name is the most popular in Russia, Kazakhstan, and Turkey. Very seldom, Kaysin is the forename as well as the last name.