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