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Cognomen Aff (Affo , Aff , افف) , throughout the world, is quite a common last name. The cognomen Aff is characteristic of Sub-Saharan Africa, particularly Togo, where it is quite a common surname, Benin, where it is quite a rare surname, and Ivory Coast. Measured by absolute frequency, the name is most common in China, Togo, and Benin. Much less frequently, Aff is the forename as well as the last name.