Cognomen เพชรเด่นลาภ (เพชรเด่นลาภ, Petchdenlap 
) , in the world, is an extremely rare family name. The cognomen เพชรเด่นลาภ is habitual in Thailand, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Petchdenlap | United States, Thailand |