Surname Siivo (Siivo 
) , in all the world, is a very rare family name. The last name Siivo is habitual in Northern Europe, particularly Finland, where it is quite a rare surname, and Estonia, where it is a rare surname.
| siivo kantala Finnish politician (1886-1954), FI (b. 1886) |
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| vihtori siivo Finnish military personnel (1913-2015), FI (b. 1913) |
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| siivo koutio FI (b. 1906) |
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