Surname Vichayasit (Vichayasit 
) , across the world, is an extremely rare last name. Much more frequently, Vichayasit is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vichayasit | Thailand |
Sunniprangkoon, Punkongchuen, Tantayapong, and Pornkittichaisri