Surname Thongluen (ทองไหล 
, Thongluen 
) , around the world, is a rare family name. The last name Thongluen is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Also, Thongluen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ทองไหล | Thailand |
| Thongluen | United States, Thailand |