Family name Phannayang (Phannayang 
) , all over the world, is a very rare last name. The cognomen Phannayang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phannayang | Thailand |
Pakhin, Chalerm, Yuphadi, and Kanitphong