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Cognomen Janvittayarak (Janvittayarak ) , throughout the world, is a very rare family name. The cognomen Janvittayarak is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Janvittayarak | Thailand |
Chutima, Pasarak, Wanlapa, and Pattarajit