Last name Sihom (Sihom 
) , throughout the world, is a very rare surname. The surname Sihom is habitual in South Africa, where it is a very rare surname, Thailand, where it is an extremely rare surname, and the United States. More frequently, Sihom is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sihom | South Africa, South Korea, Spain, Thailand, United States |