Cognomen รัตนวิศิษฏ์กุล (รัตนวิศิษฏ์กุล 
) , worldwide, is a very rare family name. The family name รัตนวิศิษฏ์กุล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตนวิศิษฏ์กุล | Thailand |