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Last name Piboonthammasak (Piboonthammasak ) , globally, is a very rare cognomen. The cognomen Piboonthammasak is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Piboonthammasak | Thailand |
Pirasak, Pitchamon, and Phatchamon