Surname Fieros (Fieros 
) , globally, is a very rare cognomen. The cognomen Fieros is characteristic of Cyprus, where it is quite a rare surname, the United States, where it is an extremely rare surname, and Mexico. Very seldom, Fieros is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fieros | Mexico, Cyprus, United States |