Family name Wong San (Wong San 
, วงศ์สาร 
) , worldwide, is a rare surname. The surname Wong San is characteristic of Thailand, where it is a rare surname, and Ecuador, where it is a very rare surname. Much less frequently, Wong San is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wong San | Malaysia, Ecuador |
| วงศ์สาร | Thailand |