Family name สุทธิสร (สุทธิสร 
, Suttasorn , Suthisorn 
) , around the world, is a very rare cognomen. The last name สุทธิสร is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, สุทธิสร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Suttasorn, Sutthisorn, สุทธิสร | Thailand |
| Suthisorn | Thailand, United States |