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