Surname Wai Seng (Wai Seng 
) , all around the world, is a rare last name. The last name Wai Seng is characteristic of South-eastern Asia, particularly Malaysia, where it is a rare surname, Singapore, and Thailand, where it is a very rare surname. More frequently, Wai Seng is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wai Seng | Australia, Thailand, Singapore, Macao, Malaysia |