Cognomen Lapphanakhen (Lapphanakhen 
) , in the world, is a very rare last name. The last name Lapphanakhen is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Lapphanakhen | Thailand |
Nathakorn, Hathaikan, and Thatsanaphan