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Cognomen Rungsarn (Rungsarn
, รุ่งสาร) , globally, is an extremely rare last name. Much more frequently, Rungsarn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rungsarn | Thailand, United States |
Sayabovorn, Saemhood, Nuntakawong, and Suthithanin