Surname คูณวงศ์ (คูณวงศ์ 
, Koonwong 
) , all over the world, is a rare family name. The last name คูณวงศ์ is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| คูณวงศ์ | Thailand |
| Koonwong | United States, Thailand |