Cognomen Phonethavy (Phonethavy 
) , around the world, is a rare family name. The cognomen Phonethavy is characteristic of Laos, where it is quite a rare surname, and Argentina, where it is an extremely rare surname. Likewise, Phonethavy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phonethavy | Argentina, Laos, United States, Thailand |