Surname วงศ์ศักดิ์ (วงศ์ศักดิ์ 
, Wongsak 
, Vongsak 
) , in the entire world, is a rare last name. The family name วงศ์ศักดิ์ is habitual in Laos, where it is quite a rare surname, Thailand, where it is a rare surname, and Australia, where it is a very rare surname. Also, วงศ์ศักดิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| วงศ์ศักดิ์ | Thailand |
| Wongsak | Thailand, Australia |
| Vongsak | Thailand, United States, Laos |
Wongishak, Wongsakate, Wongsaking, Wongsakk, Wongsakratit, Wongsaksa, Wongsaksi, Wongsasak, Wongseek, and Wongsikae
| วงศ์ศักดิ์ สวัสดิ์พาณิชย์ Thai politician, TH (b. 1951) |
|