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