Family name สว่างธรรมกุล (สว่างธรรมกุล, Sawangtummakul 
) , across the world, is an extremely rare surname. The cognomen สว่างธรรมกุล is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sawangtummakul | Thailand |