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Cognomen Riffa (Rifa , Riffa ) , all around the world, is a common last name. The cognomen Riffa is characteristic of Maldives, where it is quite a common surname, Bahrain, and Sri Lanka, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Indonesia, Bangladesh, and Sri Lanka. More frequently, Riffa is the forename as well as the last name.