Cognomen Somvichith (Somvichith 
) , in the world, is a rare surname. The family name Somvichith is habitual in Laos, where it is quite a common surname, Thailand, where it is a very rare surname, and Canada, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Somvichith | Laos, United States, Canada, Thailand |
Kom, Khoun, Citthisay, Souvanny, Phaivanh, Sitthisay, Sitthixay, Bounphamith, and Souphaphone