Mierucin was formerly part of the German Empire. In the German Empire, the place was called Ruhheim.
The place is now called Mierucin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ruhheim | German Empire | Mogilno | before the Versailles Treaty |
| Mierucin | Poland | Mogilno | after the Versailles Treaty |
| Ruhheim | German Empire | Mogilno | 1939 |
| Mierucin | Poland | Mogilno | 1945 |
| Mierucin | Poland | Bydgoszcz | 1992 |