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Cognomen Phongsagon (Phongsagon ) , all over the world, is an extremely rare last name. Much more frequently, Phongsagon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phongsagon | Thailand |
Palee, Saipun, Khamsaat, Kimchong, Lakanukit, Khantikaro, and Phisitphong