Last name กัลย์รัตนมงคล (กัลย์รัตนมงคล 
) , across the world, is an extremely rare surname. The surname กัลย์รัตนมงคล is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| กัลย์รัตนมงคล | Thailand |