Cognomen Nyoun (Nyoun 
) , in all the world, is a very rare surname. The surname Nyoun is characteristic of Australia, where it is a very rare surname, France, and Nigeria, where it is an extremely rare surname. Also, Nyoun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nyoun | Australia, Nigeria, United States, India, France |