Family name Duilio Antonio (Duilio Antonio 
) , across the world, is an extremely rare surname. The surname Duilio Antonio is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More frequently, Duilio Antonio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Duilio Antonio | Ecuador, Chile, Argentina, Peru, Costa Rica |