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