Cognomen โพธิบุญ (Phibun 
, โพธิบุญ ) , across the world, is a rare surname. The last name โพธิบุญ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, โพธิบุญ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phibun | United States, Thailand, Philippines |
| โพธิบุญ | Thailand |