Cognomen Tras (Terra 
, Tras 
, Trass 
) , across the world, is a common surname. The last name Tras is characteristic of Uruguay, where it is quite a common surname, Brazil, and Portugal. In absolute terms, it is commonest in Brazil, Uruguay, and the United States. Likewise, Tras is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Terra | Brazil, Portugal, Uruguay, United States, Italy |
| Tras | Brazil, Spain, United States, Indonesia, Italy |
| Trass | Spain, France, Canada, United States, Germany |
| Durazno | Uruguay, Argentina, Canada, Mexico, United States |