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Cognomen Райкин (Rajkin , Raikin , Raykin ) , in all the world, is quite a rare family name. The cognomen Райкин is characteristic of Japan, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Russia. Not in comparison with a country's population, it is the most numerous in Japan, Russia, and the United States. Very seldom, Райкин is the forename as well as the last name.