Last name Demetrio Ruben (Demetrio Ruben 
) , worldwide, is an extremely rare family name. The family name Demetrio Ruben is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More frequently, Demetrio Ruben is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demetrio Ruben | Peru, Ecuador, Chile |