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Last name Obioha (Obioha ) , in all the world, is a common cognomen. The cognomen Obioha is habitual in Sub-Saharan Africa, particularly Nigeria, where it is quite a rare surname, Niger, and Cameroon, where it is a rare surname. Not in comparison with a country's population, it is commonest in Nigeria, Niger, and the United States. Also, Obioha is the forename as well as the last name.