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Cognomen Jairo (Jairo , Хайро , Jaïro ) , in the world, is a common last name. The cognomen Jairo is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is a common surname, Honduras, and Venezuela, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it is commonest in Latin America and the Caribbean, particularly Mexico, Nicaragua, and Venezuela. More prevalently, Jairo is the forename as well as the last name.