Family name วงศ์วาท (Wongwat 
, วงศ์วาท ) , throughout the world, is a rare last name. The surname วงศ์วาท is characteristic of Thailand, where it is a rare surname, the United Kingdom, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, วงศ์วาท is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wongwat | United Kingdom, Thailand, United States |
| วงศ์วาท | Thailand |