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