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Cognomen Xayyavongsa (Xayyavongsa
) , across the world, is a rare surname. The family name Xayyavongsa is habitual in Laos, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Xayyavongsa | Laos, United States |