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Last name Roik (Roik , Роик , Ройк ) , globally, is quite a rare cognomen. The cognomen Roik is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Hungary, and Poland, where it is a rare surname. Measured by absolute frequency, it is commonest in Russia, Brazil, and Poland. Much less frequently, Roik is the forename as well as the last name.