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Family name Ousman (Ousman , Усман , 奥斯曼 ) , worldwide, is a common surname. The last name Ousman is characteristic of Sub-Saharan Africa, particularly Cameroon, where it is quite a common surname, Gambia, and Ethiopia (explore the name in all countries). In absolute terms, the name is most common in Sub-Saharan Africa, particularly Ethiopia, Cameroon, and Chad. Also, Ousman is the forename as well as the last name.