Family name Panthonglang (Panthonglang 
) , around the globe, is a very rare cognomen. The cognomen Panthonglang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Panthonglang | Thailand |
Samoe, Phloenta, Ratsamee, and Kittiphong