Cognomen หวั่นไหว (Wanwai 
, หวั่นไหว, Waewchant ) , in all the world, is a very rare family name. The surname หวั่นไหว is characteristic of Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, หวั่นไหว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wanwai | United States, Thailand, India |
| Waewchant | Thailand |