Cognomen Fabio Demetrio (Fabio Demetrio 
) , throughout the world, is an extremely rare last name. The cognomen Fabio Demetrio is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. More frequently, Fabio Demetrio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fabio Demetrio | Chile, Peru, Ecuador |