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Family name Ratdavanh (Ratdavanh ) , worldwide, is an extremely rare cognomen. Much more prevalently, Ratdavanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ratdavanh | United States |
Heuang, Thaodara, Nhotsavath, Visathep, Xayavong, and Phothisane