Schönwerth was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Żerniki * and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Schönwerth | German Empire | Strelno | before the Versailles Treaty |
| Żerniki, Dwór | Poland | Mogilno | after the Versailles Treaty |
| NN | German Empire | Mogilno | 1939 |
| Żerniki * | Poland | Inowrocław | 1945 |
| Żerniki * | Poland | Bydgoszcz | 1992 |