Globally, Mario Valdemar (Mario Valdemar 
) is a very rare boy's forename. The forename Mario Valdemar is characteristic of Latin America and the Caribbean, particularly Chile, where it is a rare male name. Much less frequently, Mario Valdemar is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mario Valdemar | Portugal, Chile, Peru |