Cognomen Nioki (Nioki 
) , all over the world, is a rare family name. The cognomen Nioki is characteristic of the Democratic Republic of the Congo, where it is a rare surname, and Malaysia, where it is a very rare surname. Very seldom, Nioki is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nioki | Democratic Republic of the Congo, India, United States, Malaysia, Nigeria |