Last name Nwisi (Nwisi 
) , all over the world, is a very rare surname. The surname Nwisi is characteristic of Nigeria, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and South Africa. Measured by absolute frequency, it is the most numerous in Nigeria, the United Kingdom, and the United States. Likewise, Nwisi is the forename as well as the last name.