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Cognomen Огума (小熊 , Oguma , 大熊 ) , all around the world, is quite a rare last name. The cognomen Огума is characteristic of Sub-Saharan Africa, particularly Kenya, where it is a rare surname, Nigeria, and Tanzania. Not in comparison with a country's population, it is the most numerous in Nigeria, China, and Kenya. More frequently, Огума is the forename as well as the last name.