Cognomen Sillanpää (Sillanpää 
) , in the world, is a rare surname. The family name Sillanpää is characteristic of Finland, where it is quite a common surname, Sweden, where it is quite a rare surname, and Netherlands, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Finland, Sweden, and Germany.
| VARIANT | COUNTRY |
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| Sillanpää | Finland, Netherlands, Sweden, Germany, United States |
Sillanpaa, and Sillanpaeae
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miina sillanpää Finnish politician, editor (1866-1952), FI (b. 1866) |
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frans eemil sillanpää Finnish writer, FI (b. 1888) |
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rosa sillanpää Finnish politician, FI (b. 1888) |
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| johannes sillanpää Finnish priest, FI (b. 1897) |
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seppo sillanpää Finnish guitarist, FI (b. 1953) |
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jari sillanpää Finnish singer, FI (b. 1965) |
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| mikko sillanpää Finnish researcher, FI (b. 1925) |
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henri sillanpää Finnish footballer, FI (b. 1979) |
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| juho sillanpää Finnish politician, FI (b. 1938) |
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| kari sillanpää Finnish ice hockey player, FI (b. 1946) |
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| matti sillanpää (b. 1936) |
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| reijo sillanpää FI (b. 1946) |
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| kimmo sillanpää Finn ice hockey player (1960-), FI (b. 1960) |
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| marja-leena sillanpää Finnish artist, FI (b. 1965) |
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| sanna sillanpää Finnish murderer, FI (b. 1968) |
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Jm, Satu, Saku, Sini, Simo, Siru, Suvi, Alli, Anna, Anne, Anni, Arto, Asta, Asko, Aino, Aila, Aija, Auli, Atte, Kari, Kati, Pasi, Samu, Sami, Sari, Sara, Anu, Ari, Aki, Kai, Kim, Kia, Pia, Leo, Tom, Tea, Piia, Nea, Ida, Wei, Mari, Manu, Milo, Mira, Miro, Mika, Miko, Miia, Esa, and Rami