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Family name Jantamenchai (Jantamenchai ) , all around the world, is a very rare cognomen. The cognomen Jantamenchai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jantamenchai | Thailand |
Montree, Phobthorn, and Phakhawadee