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