Cognomen Bertulio (Bertulio 
) , around the globe, is a rare last name. The family name Bertulio is characteristic of Italy, where it is a very rare surname, Honduras, and Venezuela. In absolute terms, it is commonest in Brazil, Italy, and Venezuela. Likewise, Bertulio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bertulio | Costa Rica, Italy, Colombia, Brazil, Venezuela |