Cognomen Wiritchai (Wiritchai 
) , in the world, is an extremely rare last name. The family name Wiritchai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Wiritchai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wiritchai | Thailand |