Last name Contreras Borja (Contreras Borja 
) , throughout the world, is a very rare cognomen. The cognomen Contreras Borja is characteristic of Ecuador, where it is a rare surname, Spain, where it is a very rare surname, and Chile, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Contreras Borja | Chile, Spain, Ecuador |