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