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Last name Trinidad (Trinidad , טרינידד , Тринидад ) , around the world, is a widespread surname. The cognomen Trinidad is characteristic of Latin America and the Caribbean, particularly the Dominican Republic, where it is a common surname, Paraguay, and Mexico (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Mexico, Philippines, and Spain. Also, Trinidad is the forename as well as the last name.