Surname สว่างชัย (Sawangchai 
, สว่างชัย) , in all the world, is a rare family name. The last name สว่างชัย is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, สว่างชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sawangchai | Thailand |