Family name Ruangpongsiri (Ruangpongsiri 
) , all over the world, is an extremely rare cognomen. The surname Ruangpongsiri is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ruangpongsiri | Thailand |
Radathip, Nutthanon, and Mattanaporn