Family name Cubillos Jara (Cubillos Jara 
) , globally, is a very rare surname. The last name Cubillos Jara is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname, and Ecuador.
| VARIANT | COUNTRY |
|---|---|
| Cubillos Jara | Chile, Ecuador |
Oscar, Margarita, and Jonathan Simon