Last name สวัสดิวงษ์ (สวัสดิวงษ์ 
, Sawadtayawong 
) , all over the world, is a very rare surname. The surname สวัสดิวงษ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| สวัสดิวงษ์ | Thailand |
| Sawadtayawong | Malaysia, Thailand |