Family name Jansomkhoy (Jansomkhoy 
) , around the world, is a very rare surname. The surname Jansomkhoy is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jansomkhoy | Thailand |
Supannee, Monruedee, and Gunlayarut