Around the world, สิทธิสุนทร (สิทธิสุนทร 
, Sittisunthorn , Sittisuntorn 
) is an extremely rare unknown gender first name. Much more frequently, สิทธิสุนทร is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sittisunthorn, สิทธิสุนทร | Thailand |
| Sittisuntorn | United States, Thailand |