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Family name Sillanpaa (Sillanpaa
) , all over the world, is quite a rare surname. The cognomen Sillanpaa is habitual in Northern Europe, particularly Finland, where it is quite a common surname, Sweden, where it is a rare surname, and Estonia. Measured by absolute frequency, this name is the most popular in Finland, the United States, and Sweden.
| VARIANT | COUNTRY |
|---|---|
| Sillanpaa | Canada, Sweden, Austria, United States, Finland |