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Cognomen Clemencia (Clemencia , Clementia ) , all around the world, is a common surname. The cognomen Clemencia is habitual in Latin America and the Caribbean, particularly Mexico, where it is quite a common surname, Nicaragua, where it is quite a rare surname, and Venezuela. Not in comparison with a country's population, it is commonest in Mexico, Spain, and Venezuela. More frequently, Clemencia is the forename as well as the last name.