Family name Phongsimphakorn (Phongsimphakorn 
) , in the entire world, is a very rare cognomen. The surname Phongsimphakorn is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phongsimphakorn | Thailand |
Shewin, Sitthidech, Kwanchiwa, and Khwanchiwa