Surname Viengchai (Viengchai 
) , throughout the world, is a very rare last name. The last name Viengchai is habitual in Thailand, where it is a very rare surname, France, where it is an extremely rare surname, and the United States. Very seldom, Viengchai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viengchai | France, Thailand, United States |