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Cognomen Cubero (Cubero , Куберо ) , in the entire world, is a common surname. The cognomen Cubero is habitual in Costa Rica, where it is a common surname, Puerto Rico, where it is quite a rare surname, and Spain. Not in comparison with a country's population, it is the most numerous in Costa Rica, Philippines, and Spain. Much less frequently, Cubero is the forename as well as the last name.