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Cognomen Retana (Retana ) , in the entire world, is a common last name. The family name Retana is characteristic of Latin America and the Caribbean, particularly Costa Rica, where it is a common surname, El Salvador, where it is quite a common surname, and Guatemala. Measured by absolute frequency, it is the most numerous in Latin America and the Caribbean, particularly Mexico, Costa Rica, and Guatemala. Very seldom, Retana is the forename as well as the last name.