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Family name Oreja (Orea , Oreja , Ореха ) , in all the world, is quite a rare cognomen. The family name Oreja is characteristic of Spain, where it is quite a rare surname, Papua New Guinea, and Venezuela. Not in comparison with a country's population, this name is the most popular in Spain, Mexico, and Philippines. Likewise, Oreja is the forename as well as the last name.