Rosnówko was formerly part of the German Empire. In the German Empire, the place was called Rosenhagen.
The place is now called Rosnówko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rosnowo | German Empire | Posen West | before the Versailles Treaty |
| Rosnówko | Poland | Poznań | after the Versailles Treaty |
| Rosenhagen | German Empire | Posen | 1939 |
| Rosnówko | Poland | Poznań | 1945 |
| Rosnówko | Poland | Poznań | 1992 |