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Cognomen Kossi (Kossi , コシ , Gosse ) , in all the world, is a common last name. The surname Kossi is characteristic of Sub-Saharan Africa, particularly Togo, where it is quite a common surname, the Democratic Republic of the Congo, and Ivory Coast, where it is quite a rare surname. In absolute terms, it is the most numerous in the Democratic Republic of the Congo, Ethiopia, and France. Likewise, Kossi is the forename as well as the last name.