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Cognomen Rios (Rios , Ríos , Риос ) , in the world, is a prevalent last name. The family name Rios is characteristic of Latin America and the Caribbean, particularly Panama, where it is a common surname, Paraguay, and Nicaragua (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Latin America and the Caribbean, particularly Mexico, Colombia, and Argentina. Very seldom, Rios is the forename as well as the last name.