Surname แสงจั่น (Saengchan 
, แสงจั่น) , in all the world, is quite a rare family name. The surname แสงจั่น is characteristic of Thailand, where it is quite a rare surname, Finland, where it is a rare surname, and Malaysia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Thailand, Finland, and the United States. Very seldom, แสงจั่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saengchan | Germany, Malaysia, Finland, United States, Thailand |