Family name อิทธิศร (อิทธิศร 
) , globally, is a very rare last name. The family name อิทธิศร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, อิทธิศร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อิทธิศร | Thailand |