Surname Peña Alfaro (Peña Alfaro 
) , around the world, is a very rare family name. The last name Peña Alfaro is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname, Mexico, where it is a very rare surname, and Ecuador. In absolute terms, it is the most numerous in Mexico, Chile, and Spain.
| VARIANT | COUNTRY |
|---|---|
| Peña Alfaro | Peru, Spain, Chile, Mexico, Ecuador |