Surname Oronzio (Oronzio 
) , across the world, is a very rare cognomen. The surname Oronzio is characteristic of Hungary, where it is a very rare surname, Italy, and the United States. Likewise, Oronzio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oronzio | Brazil, Italy, Hungary, Argentina, United States |