Surname Acuňa (Acuňa 
) , globally, is a very rare cognomen. The cognomen Acuňa is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname, Colombia, and Argentina, where it is an extremely rare surname. In absolute terms, it is commonest in Latin America and the Caribbean, particularly Colombia, Chile, and Mexico.
| VARIANT | COUNTRY |
|---|---|
| Acuňa | Mexico, Chile, Argentina, Colombia |
| alejandro nogues acuňa Argentine chess player, AR (b. 1907) |
|