Family name تريس (Tris 
, Tres , Tress ) , around the globe, is a common last name. The cognomen تريس is habitual in Guatemala, where it is quite a rare surname, Paraguay, and Indonesia. Not in comparison with a country's population, it is commonest in Indonesia, Brazil, and Germany. Likewise, تريس is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tres, Tress, Tris | Brazil, Spain, United States, Indonesia, Germany |
| تريس | Yemen, Saudi Arabia, Libya, Sudan, Jordan |