Rzadkwin was formerly part of the German Empire. In the German Empire, the place was called Seedorf.
The place is now called Rzadkwin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rzadkwin | German Empire | Strelno | before the Versailles Treaty |
| Rzadkwin | Poland | Mogilno | after the Versailles Treaty |
| Seedorf | German Empire | Mogilno | 1939 |
| Rzadkwin | Poland | Mogilno | 1945 |
| Rzadkwin | Poland | Bydgoszcz | 1992 |