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Family name Promtat (Promtat ) , worldwide, is a very rare surname. The last name Promtat is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Promtat | Thailand |
Pakorn, Payorm, Sawanya, Siwapon, Chantana, Surapongse, Chalermpon, and Chalermpol