Cognomen Costavalo Saverio (Costavalo Saverio 
) , across the world, is a very rare family name. The surname Costavalo Saverio is characteristic of Latin America and the Caribbean, particularly Ecuador, where it is a very rare surname, and Chile, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Costavalo Saverio | Ecuador, Chile |