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Cognomen Rayo (Rayo , デ , Райо ) , in the world, is a common last name. The family name Rayo is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is a common surname, Colombia, where it is quite a common surname, and Costa Rica, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Latin America and the Caribbean, particularly Nicaragua, Mexico, and Colombia. Very seldom, Rayo is the forename as well as the last name.