Cognomen กุลเพ็ชร (Kulaphet 
, กุลเพ็ชร ) , around the world, is a very rare last name. The family name กุลเพ็ชร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, กุลเพ็ชร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| กุลเพ็ชร, Kulaphet | Thailand |