Last name รัศ (Rat 
, รัศ 
) , worldwide, is a common family name. The surname รัศ is characteristic of Romania, where it is quite a common surname, France, where it is quite a rare surname, and Oman. Not in comparison with a country's population, it most frequently occurs in Bangladesh, France, and Romania. Likewise, รัศ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rat | Romania, Bangladesh, Myanmar, France, India |
| รัศ | Thailand |