Family name สิงห์ชัย (สิงห์ชัย 
, Singchai 
) , in the entire world, is quite a rare surname. The last name สิงห์ชัย is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Also, สิงห์ชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิงห์ชัย | Thailand |
| Singchai | United States, Malaysia, Thailand |