Surname กอสิทธิไพศาล (กอสิทธิไพศาล 
) , all over the world, is a very rare family name. The cognomen กอสิทธิไพศาล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| กอสิทธิไพศาล | Thailand |