Cognomen เบญจพงศ์สิริ (เบญจพงศ์สิริ 
) , throughout the world, is an extremely rare last name. The surname เบญจพงศ์สิริ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| เบญจพงศ์สิริ | Thailand |