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Family name Rudz (Rudz , Рудз , Рудзь ) , in all the world, is a rare last name. The last name Rudz is characteristic of Estonia, where it is a rare surname, Poland, and Argentina, where it is a very rare surname. Measured by absolute frequency, it is commonest in Poland, Indonesia, and the United States. More prevalently, Rudz is the forename as well as the last name.