Last name รัตนสุมาวงศ์ (รัตนสุมาวงศ์ 
, Ratanasumawong , Rattanasumavong ) , throughout the world, is a rare family name. The family name รัตนสุมาวงศ์ is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| รัตนสุมาวงศ์, Ratanasumawong, Rattanasumavong | Thailand |
| Rattanasumawong | United States, Thailand |