Cognomen แพงศิริ (แพงศิริ 
) , globally, is a very rare surname. The cognomen แพงศิริ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, แพงศิริ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| แพงศิริ | Thailand |