Cognomen Lertpraingam (Lertpraingam 
) , in all the world, is a rare surname. The cognomen Lertpraingam is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Lertpraingam | Thailand |
Rujira, Napavadee, and Gunthasith