Cognomen Siaman (Siaman 
) , all around the world, is a rare family name. The surname Siaman is habitual in South-eastern Asia, particularly Malaysia, where it is a rare surname, Indonesia, where it is a very rare surname, and Philippines. Likewise, Siaman is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siaman | Indonesia, Malaysia, Philippines, United States, India |