Family name Acuña Merino (Acuña Merino 
) , in the world, is a very rare last name. The family name Acuña Merino is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname, and Ecuador, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Acuña Merino | Chile, Ecuador |