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Cognomen Nanwa (Nanwa ) , worldwide, is a rare family name. The last name Nanwa is characteristic of Cameroon, where it is quite a rare surname, Tanzania, where it is a very rare surname, and Canada. Not in comparison with a country's population, it is commonest in Sub-Saharan Africa, particularly Cameroon, Tanzania, and Nigeria. Also, Nanwa is the forename as well as the last name.