Last name วงศ์ศิริวัชร (วงศ์ศิริวัชร 
) , all over the world, is an extremely rare cognomen. The cognomen วงศ์ศิริวัชร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| วงศ์ศิริวัชร | Thailand |