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Last name Прок (Prok , Prock , Прок ) , throughout the world, is quite a rare cognomen. The cognomen Прок is habitual in Austria, where it is quite a rare surname, Iceland, and Slovakia, where it is a rare surname. Measured by absolute frequency, it is commonest in the United States, Indonesia, and Austria. Very seldom, Прок is the forename as well as the last name.