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 | Portugal, Uruguay, Brazil, Italy, United States |
| Tras | Spain, Brazil, Italy, Indonesia, United States |
| Trass | Canada, Spain, France, United States, Germany |
| Durazno | Canada, Uruguay, Mexico, United States, Argentina |