Cognomen Ñuño (Ñuño 
) , in the world, is an extremely rare surname. The last name Ñuño is habitual in Latin America and the Caribbean, particularly Argentina, where it is an extremely rare surname. More frequently, Ñuño is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ñuño | Argentina, Spain |