Surname Antoñio (Antoñio 
) , in all the world, is a very rare family name. The last name Antoñio is habitual in Spain, where it is a very rare surname, Chile, where it is an extremely rare surname, and Mexico. More prevalently, Antoñio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Antoñio | Uruguay, Mexico, Spain, United States, Peru |