Last name Wai Siong (Wai Siong 
) , in the entire world, is a very rare family name. The surname Wai Siong is habitual in South-eastern Asia, particularly Singapore, where it is a rare surname, and Malaysia. Likewise, Wai Siong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wai Siong | Australia, Philippines, Singapore, Malaysia |