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Last name Sadou (Sadou , Саду ) , throughout the world, is a common cognomen. The last name Sadou is habitual in Cameroon, where it is quite a common surname, Algeria, where it is quite a rare surname, and Guinea. Not in comparison with a country's population, it is the most numerous in Cameroon, Algeria, and Niger. Likewise, Sadou is the forename as well as the last name.