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Worldwide, Phoutthavongsa (Phoutthavongsa ) is an extremely rare unknown gender forename. Much more frequently, Phoutthavongsa is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Phoutthavongsa | Laos |
Bounmy, Keo Oudom, Phetmany, Souksavanh, Phonesavanh, and Douangsavanh