Family name ทองสุข (ทองสุข 
, Thongsuk 
, Thongsouk 
) , around the world, is a common last name. The cognomen ทองสุข is characteristic of Thailand, where it is quite a common surname, Laos, where it is quite a rare surname, and the United States, where it is a very rare surname. Also, ทองสุข is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ทองสุข | Thailand |
| Thongsuk | Germany, United States, Thailand, France, New Zealand |
| Thongsouk | Laos, United States, Thailand, Canada, France |
| Thongsook | United States, Thailand |
Dhakerngsook, Taongsuk, Thognsookh, Thomgsuk, Thonggsuk, Thongnsuk, Thongsesuk, Thongsoook, Thongsuek, Thongsukh, Thongsukhum, Thongsukl, Thongsulk, Thonksook, Tongmesuk, Tongsuck, Tongsuk, Tongsukh, and Tongsukum