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Cognomen Thammanavarat (Thammanavarat
) , throughout the world, is a very rare family name. The cognomen Thammanavarat is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thammanavarat | United States, Thailand |
Udom, Chakrit, Chidsanu, and Chompunoot