Surname Phetthanou (Phetthanou 
) , around the globe, is a rare family name. The last name Phetthanou is habitual in South-eastern Asia, particularly Laos, where it is quite a common surname. Much less frequently, Phetthanou is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phetthanou | Laos, United States |