Family name コシ (Kossi 
, コシ 
) , in the world, is a common surname. The last name コシ is characteristic of Sub-Saharan Africa, particularly Togo, where it is quite a common surname, the Democratic Republic of the Congo, and Gabon, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, Ethiopia, and Togo. Also, コシ is the forename as well as the last name.