Family name Isidoro Antonio (Isidoro Antonio 
) , in all the world, is a very rare cognomen. The family name Isidoro Antonio is habitual in Chile, where it is a rare surname, and Spain, where it is a very rare surname. More prevalently, Isidoro Antonio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Isidoro Antonio | Italy, Peru, Ecuador, Spain, Chile |