Cognomen Contreras Alvial (Contreras Alvial 
) , globally, is a very rare family name. The last name Contreras Alvial is characteristic of Latin America and the Caribbean, particularly Chile, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Contreras Alvial | Chile |
Estefania, Gustavo Miguel, Sandra Angelica, and Oscar Alejandro