Family name Khanthasit (Khanthasit 
) , throughout the world, is a very rare surname. The cognomen Khanthasit is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khanthasit | Thailand |
| sakhorn khanthasit Thai wheel chair tennis player, TH (b. 1971) |
|