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