Keilchensee was formerly part of the German Empire. In the German Empire, the place was called Teerofen.
The place is now called Smolarnia and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Keilchensee | German Empire | Schwerin (Warthe) | before the Versailles Treaty |
| Keilchensee | German Empire | Schwerin (Warthe) | after the Versailles Treaty |
| Keilchensee, Fh. | German Empire | Schwerin (Warthe) | 1939 |
| Teerofen | German Empire | Schwerin (Warthe) | 1939 |
| Smolarnia | Under Polish administration | Skwierzyna | 1945 |
| Smolarnia | Poland | Gorzów | 1992 |