Cognomen Phouthaphone (Phouthaphone 
) , worldwide, is an extremely rare last name. The family name Phouthaphone is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more prevalently, Phouthaphone is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phouthaphone | Laos, United States |