Surname Siimann (西曼 
, Siimann 
, Сийманн) , around the world, is a rare cognomen. The family name Siimann is characteristic of Estonia, where it is quite a rare surname, Finland, where it is a rare surname, and Canada, where it is an extremely rare surname. In absolute terms, it is commonest in Estonia, China, and Finland. Also, Siimann is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 西曼 | China |
| Siimann | Finland, Canada, Estonia |
| Сііманн | Ukraine |
|
mart siimann Prime Minister of Estonia, EE (b. 1946) |
|
| ain siimann Estonian pedagogue, EE (b. 1940) |
|