Cognomen Nnoli (Nnoli 
) , across the world, is quite a rare surname. The last name Nnoli is characteristic of Nigeria, where it is quite a rare surname, Norway, where it is a rare surname, and Poland, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Nigeria, the United States, and Poland. Also, Nnoli is the forename as well as the last name.