Family name Popoonngern (Popoonngern 
) , in the entire world, is a very rare last name. The cognomen Popoonngern is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Popoonngern | Thailand |
Nipa, Manus, Aksarapak, and Thanyaporn