Cognomen ชัส (Chat 
, ชัส ) , all around the world, is quite a common surname. The last name ชัส is habitual in Malaysia, where it is quite a rare surname, France, and Sri Lanka, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Malaysia, France, and Pakistan. Likewise, ชัส is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chat | Thailand, France, Pakistan, India, Malaysia |
| ชัส | Thailand |