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Family name Mansa (Mancha , Mansa , منسى ) , across the world, is a common cognomen. The cognomen Mansa is characteristic of Spain, where it is quite a common surname, Egypt, where it is quite a rare surname, and Peru. Measured by absolute frequency, this name is the most popular in Spain, Egypt, and Mexico. Much less frequently, Mansa is the forename as well as the last name.