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Cognomen Romaeus (Romero , Romaeus ) , around the world, is a prevalent last name. The cognomen Romaeus is characteristic of Latin America and the Caribbean, particularly El Salvador, where it is a widespread surname, Argentina, and Honduras (explore the name in all countries). Measured by absolute frequency, the name is most common in Latin America and the Caribbean, particularly Mexico, Argentina, and Colombia. Very seldom, Romaeus is the forename as well as the last name.