Cognomen Wangjoy (Wangjoy 
) , around the world, is a very rare family name. The cognomen Wangjoy is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Wangjoy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wangjoy | India, Thailand |