Cognomen ถ่วง (Thuang 
, Clutter 
, ถ่วง) , around the globe, is quite a rare surname. The last name ถ่วง is characteristic of the United States, where it is a rare surname, Malaysia, and Tunisia. Much less frequently, ถ่วง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thuang | China, Malaysia, Thailand, United States, Myanmar |
| Clutter | United Kingdom, Tunisia, Australia, United States, Canada |