Cognomen Wiy (Wiy 
) , in all the world, is a rare family name. The family name Wiy is habitual in Taiwan, where it is a rare surname, Malaysia, and Indonesia, where it is a very rare surname. Much less frequently, Wiy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wiy | Indonesia, Malaysia, Taiwan, Thailand, Myanmar |