Bügen was formerly part of the German Empire. In the German Empire, the place was called Bügen.
The place is now called Bugaj and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Bugaj | German Empire | Wreschen | before the Versailles Treaty |
| Bugaj | Poland | Września | after the Versailles Treaty |
| Bügen | German Empire | Wreschen | 1939 |
| Bugaj | Poland | Września | 1945 |
| Bugaj | Poland | Poznań | 1992 |