Cognomen ช่างทอง (Goldsmith 
, Changthong 
, Goldsmit 
) , across the world, is a common family name. The cognomen ช่างทอง is habitual in Isle of Man, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and Australia. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Goldsmith | United Kingdom, Australia, Thailand, United States, Canada |
| Changthong | Thailand, India, France, United States |
| Goldsmit | United Kingdom, Mexico, United States, Canada, Israel |