Cognomen Phonsavatdy (Phonsavatdy 
) , in all the world, is a rare last name. The surname Phonsavatdy is habitual in Laos, where it is quite a rare surname, Canada, where it is a very rare surname, and France, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Laos, Canada, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Phonsavatdy | Laos, United States, France, Canada |