Cognomen รอช (Rot 
, รอช 
) , in all the world, is quite a common surname. The last name รอช is characteristic of Slovenia, where it is quite a common surname, Myanmar, where it is quite a rare surname, and Bulgaria. Measured by absolute frequency, it is commonest in Myanmar, India, and Germany. Very seldom, รอช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rot | Germany, Slovenia, India, Myanmar, Poland |
| รอช | Thailand |