Surname Pheungpasomxay (Pheungpasomxay 
) , across the world, is a rare cognomen. The last name Pheungpasomxay is habitual in Laos, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pheungpasomxay | Laos, United States |