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Cognomen Karnjanarach (Karnjanarach ) , worldwide, is a very rare last name. The cognomen Karnjanarach is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Karnjanarach | Thailand |
Chaba, Worarat, Wittawat, and Atchariyaporn