Surname ธำรงค์ศักดิ์ (Thamrongsak 
, ธำรงค์ศักดิ์) , in the entire world, is a very rare family name. The last name ธำรงค์ศักดิ์ is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, ธำรงค์ศักดิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thamrongsak | United States, Thailand |