Cognomen Willai (Willai 
) , around the world, is a very rare surname. The family name Willai is habitual in France, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Willai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Willai | India, United States, France |