Cognomen สิทธิ์ไตร (สิทธิ์ไตร 
) , in all the world, is an extremely rare last name. The cognomen สิทธิ์ไตร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สิทธิ์ไตร | Thailand |