Cognomen Demetrya (Demetrya 
) , globally, is an extremely rare family name. The last name Demetrya is characteristic of Mexico, where it is an extremely rare surname, and the United States. More prevalently, Demetrya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demetrya | Mexico, Brazil, United States |