NN was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Bończa and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Boncza | German Empire | Czarnikau | before the Versailles Treaty |
| Bończa, Folwark | Poland | Czarnków | after the Versailles Treaty |
| NN | German Empire | Scharnikau (Wartheland) | 1939 |
| Bończa | Poland | Czarnków | 1945 |
| Bończa | Poland | Piła | 1992 |