Cognomen อิทธิ์สมพล (อิทธิ์สมพล 
) , across the world, is an extremely rare family name. The family name อิทธิ์สมพล is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| อิทธิ์สมพล | Thailand |