Surname สธรรม (Fair 
, สธรรม 
) , in all the world, is a common family name. The last name สธรรม is characteristic of Bahamas, where it is quite a rare surname, the United States, and Canada. Not in comparison with a country's population, this name is the most popular in the United States, the United Kingdom, and Canada. Much less frequently, สธรรม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fair | Canada, Egypt, United Kingdom, United States, Indonesia |
| สธรรม | Thailand |