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Last name Onoja (Onoja
) , all around the world, is a common family name. The last name Onoja is habitual in Nigeria, where it is quite a common surname, Niger, where it is quite a rare surname, and the United Kingdom, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Nigeria, Niger, and the United States. Likewise, Onoja is the forename as well as the last name.