Surname Montalvo Cozar (Montalvo Cozar 
) , throughout the world, is an extremely rare last name. The cognomen Montalvo Cozar is characteristic of Latin America and the Caribbean, particularly Ecuador, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Montalvo Cozar | Ecuador |
Oswaldo, and Oswaldo Enrique