Last name สิทธิไพศาล (สิทธิไพศาล 
, Sittiphaisal , Sitthiphaisal ) , globally, is a very rare surname. The family name สิทธิไพศาล is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sittiphaisal, Sitthiphaisal, สิทธิไพศาล | Thailand |