Grudno, Folwark was formerly part of the German Empire. In the German Empire, the place was called Grudna.
The place is now called Grudno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Grudna | German Empire | Obornik/Obernick | before the Versailles Treaty |
| Grudno, Folwark | Poland | Oborniki | after the Versailles Treaty |
| Grudna | German Empire | Obernick | 1939 |
| Grudna | Poland | Oborniki | 1945 |
| Grudno | Poland | Piła | 1992 |