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Cognomen Nwana (Nwana ) , across the world, is quite a rare last name. The cognomen Nwana is characteristic of Sub-Saharan Africa, particularly Cameroon, where it is quite a rare surname, Nigeria, where it is a rare surname, and South Africa, where it is a very rare surname. In absolute terms, it most frequently occurs in Nigeria, Cameroon, and the United States. Likewise, Nwana is the forename as well as the last name.