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Cognomen Orejon (Orejon ) , in all the world, is quite a rare surname. The surname Orejon is habitual in Peru, where it is quite a rare surname, Argentina, where it is a rare surname, and Spain. Measured by absolute frequency, the name is most common in Latin America and the Caribbean, particularly Peru, Mexico, and Argentina. Very seldom, Orejon is the forename as well as the last name.