In the entire world, Romualdo Antonio (Romualdo Antonio 
) is a rare male first name. The forename Romualdo Antonio is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare masculine name. Very seldom, Romualdo Antonio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Romualdo Antonio | Philippines, Spain, Brazil, Chile, Ecuador |