Family name Siimer (Siimer 
) , throughout the world, is a rare last name. The last name Siimer is habitual in Estonia, where it is quite a rare surname, Finland, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| margarete siimer (b. 1928) |
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| mart siimer Estonian composer, EE (b. 1967) |
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| kristo siimer Estonian biathlete, EE (b. 1999) |
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