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 | Australia, Canada, Thailand, United Kingdom, United States |
| Changthong | India, United States, Thailand, France |
| Goldsmit | Canada, United Kingdom, United States, Israel, Mexico |