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 | Malaysia, Thailand, China, Myanmar, United States |
| Clutter | Australia, Tunisia, United Kingdom, Canada, United States |