Last name Otoniel Antonio (Otoniel Antonio 
) , all over the world, is an extremely rare family name. The last name Otoniel Antonio is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. More frequently, Otoniel Antonio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Otoniel Antonio | Costa Rica, Peru, Chile, Ecuador |