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Last name Иванофф (Ivanoff , Иванофф ) , all over the world, is quite a rare surname. The cognomen Иванофф is habitual in Uruguay, where it is quite a rare surname, Finland, and Argentina. Measured by absolute frequency, it is commonest in Argentina, the United States, and France. Very seldom, Иванофф is the forename as well as the last name.