Family name Siwah (Siwah 
) , across the world, is a rare cognomen. The surname Siwah is habitual in Ethiopia, where it is a very rare surname, Malaysia, and Indonesia. Much less frequently, Siwah is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siwah | Malaysia, Ethiopia, Indonesia, India, United States |