Family name Phantiyavong (Phantiyavong 
) , worldwide, is a rare last name. The cognomen Phantiyavong is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname, and Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phantiyavong | Laos, Thailand |
Saisamone, and Souksavanh