Cognomen Lamphoon (Lamphoon 
) , globally, is an extremely rare family name. The cognomen Lamphoon is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Lamphoon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lamphoon | Thailand, France, United States, Hungary |