Cognomen บางเพ็ญศิริ (บางเพ็ญศิริ 
) , across the world, is an extremely rare family name. The family name บางเพ็ญศิริ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| บางเพ็ญศิริ | Thailand |