Surname Peñazco (Peñazco 
) , around the globe, is a very rare family name. The cognomen Peñazco is characteristic of Latin America and the Caribbean, particularly Peru, where it is a very rare surname, Costa Rica, and Chile, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Latin America and the Caribbean, particularly Peru, Mexico, and Costa Rica. Very seldom, Peñazco is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Peñazco | Spain, Mexico, Chile, Peru, Costa Rica |
Petrona, and Elsa Aurora