NN was formerly part of the German Empire. In the German Empire, the place was called Rowna.
The place is now called NN and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rowna | German Empire | Gnesen | before the Versailles Treaty |
| NN | Poland | Gniezno | after the Versailles Treaty |
| Rowna | German Empire | Gnesen | 1939 |
| Równa | Poland | Gniezno | 1945 |
| NN | Poland | Poznań | 1992 |