Cognomen Santillan Valenzuela (Santillan Valenzuela 
) , worldwide, is a very rare family name. The cognomen Santillan Valenzuela is habitual in Latin America and the Caribbean, particularly Ecuador, where it is a rare surname, and Chile, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Santillan Valenzuela | Ecuador, Chile |