All over the world, สิทธิสง (สิทธิสง 
, Sitthaisong , Sithisong 
) is an extremely rare boy's given name. More frequently, สิทธิสง is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| สิทธิสง, Sitthaisong | Thailand |
| Sithisong | United States, Thailand |