Cognomen Ywai (Ywai 
) , globally, is a rare family name. The surname Ywai is habitual in Myanmar, where it is a rare surname, and Brazil, where it is an extremely rare surname. Also, Ywai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ywai | Brazil, Canada, United States, Myanmar, India |