Last name Antonio Isaias (Antonio Isaias 
) , in all the world, is a very rare cognomen. The surname Antonio Isaias is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname. More frequently, Antonio Isaias is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Antonio Isaias | Costa Rica, Spain, Chile, Ecuador, Peru |