Jania Góra was formerly part of the German Empire. In the German Empire, the place was called Johannisberg, Kr. Schwetz (Weichsel).
The place is now called Jania Góra and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Johannisberg | German Empire | Schwetz | before the Versailles Treaty |
| Jania Góra | Poland | Świecie | after the Versailles Treaty |
| Johannisberg, Kr. Schwetz (Weichsel) | German Empire | Schwetz (Weichsel) | 1939 |
| Jania Góra | Poland | Świecie | 1945 |
| Jania Góra | Poland | Bydgoszcz | 1992 |