Surname วงศ์วิโรจน์ (วงศ์วิโรจน์ 
, Wongwiroj , Wongwirot ) , in the entire world, is a very rare last name. The family name วงศ์วิโรจน์ is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, วงศ์วิโรจน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wongwiroj, Wongwirot, วงศ์วิโรจน์ | Thailand |
| Wongviroj | Thailand, United States |
Wongvairoj, and Wongwirote
| สายเชีย วงศ์วิโรจน์ Thai film actor and stunt performer, TH (b. 1976) |
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