Cognomen Nuain (Nuain 
) , in all the world, is a very rare family name. The family name Nuain is habitual in Thailand, where it is a very rare surname, India, where it is an extremely rare surname, and Nigeria. Likewise, Nuain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nuain | Nigeria, India, Thailand |