Rosenau (Bz. Bromberg) was formerly part of the German Empire. In the German Empire, the place was called Krentzrosenau.
The place is now called Jastrzębowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rosenau (Bz. Bromberg) | German Empire | Mogilno | before the Versailles Treaty |
| Jastrzębowo | Poland | Mogilno | after the Versailles Treaty |
| Rosenau | German Empire | Mogilno | 1939 |
| Krentzrosenau | German Empire | Mogilno | 1939 |
| Jastrzębowo | Poland | Mogilno | 1945 |
| Jastrzębowo | Poland | Bydgoszcz | 1992 |