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Cognomen Oros (Oros
, Arroz
, Орос
) , throughout the world, is a common family name. The cognomen Oros is characteristic of Eastern Europe, particularly Romania, where it is quite a common surname, Slovakia, and Ukraine. Not in comparison with a country's population, it most frequently occurs in Romania, Mexico, and Ukraine. Very seldom, Oros is the forename as well as the last name.