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Family name Phianghathai (Phianghathai ) , around the globe, is an extremely rare cognomen. Much more frequently, Phianghathai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phianghathai | Thailand |
Piboon, Thopok, Namwong, Karahong, Vongsuravanich, and Thummajaroen