Surname กระจ่างแสง (กระจ่างแสง, Krachangsaeng 
) , in the world, is an extremely rare family name. The family name กระจ่างแสง is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Krachangsaeng | Thailand |
Brighten, Krajangsang, and Krajaysaeng