Surname Stefano Antonio (Stefano Antonio 
) , in all the world, is a very rare family name. The last name Stefano Antonio is characteristic of Chile, where it is a very rare surname, and Spain. More prevalently, Stefano Antonio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Stefano Antonio | Spain, Peru, Italy, Chile, Ecuador |
Mangia, Sernia, Parisi, Pirovano, Valentini, Mejia Reyes, De Bartolo, and Bacigalupo Arce