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Family name Phumichaiyotin (Phumichaiyotin ) , worldwide, is an extremely rare last name. The cognomen Phumichaiyotin is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phumichaiyotin | Thailand |
Pongsitorn, and Phongsittorn