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Family name Sillman (Sillman
, Sillmann
) , all over the world, is quite a rare cognomen. The surname Sillman is habitual in Finland, where it is quite a rare surname, Germany, and Sweden, where it is a rare surname. Measured by absolute frequency, it is commonest in Germany, the United States, and Finland.
| VARIANT | COUNTRY |
|---|---|
| Sillman | United Kingdom, United States, Sweden, Finland, Brazil |
| Sillmann | Australia, United States, Germany, Netherlands, Brazil |