Cognomen ทองหลวง (Thonglang 
, ทองหลวง , Tongluang ) , in all the world, is a rare surname. The last name ทองหลวง is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Also, ทองหลวง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thonglang | Sweden, China, Thailand, India |
| Thongloueng, ทองหลวง, Tongluang | Thailand |
Thonghluang, Thongleuang, and Thongluang