Surname Fernández Vargas (Fernández Vargas 
) , in the world, is a very rare last name. The surname Fernández Vargas is habitual in Bolivia, where it is a rare surname, Costa Rica, where it is a very rare surname, and Spain. Not in comparison with a country's population, the name is most common in Bolivia, Spain, and Colombia.
| VARIANT | COUNTRY |
|---|---|
| Fernández Vargas | Bolivia, Costa Rica, Peru, Colombia, Spain |