Last name รัต (Rat 
, รัต 
, Rhat 
) , in all the world, is a common family name. The cognomen รัต is habitual in Romania, where it is quite a common surname, France, where it is quite a rare surname, and Oman. Measured by absolute frequency, the name is most common in Bangladesh, France, and Romania. Also, รัต is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rat | Bangladesh, France, India, Myanmar, Romania |
| รัต | Thailand |
| Rhat | Pakistan, India, United States, Myanmar |