Family name Demetras (Demetras 
) , globally, is a very rare last name. The family name Demetras is habitual in the United States, where it is a very rare surname, Canada, where it is an extremely rare surname, and Brazil. Likewise, Demetras is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demetras | Brazil, United States, Canada |