Cognomen หงษ์ทองคำ (หงษ์ทองคำ, Hongtongkam 
) , across the world, is an extremely rare last name. The last name หงษ์ทองคำ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hongtongkam | Thailand |