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Surname Kató (Kató , Като ) , in all the world, is a rare last name. The cognomen Kató is characteristic of Eastern Europe, particularly Hungary, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Romania. Measured by absolute frequency, the name is most common in Eastern Europe, particularly Hungary, Russia, and Romania. Also, Kató is the forename as well as the last name.