Siemianów was formerly part of the German Empire. In the German Empire, the place was called Tiefensee.
The place is now called Siemianów and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Tiefensee | German Empire | Strehlen | 1939 |
| Siemianów | Under Polish administration | Strzelin | 1945 |
| Siemianów | Poland | Wrocław | 1992 |