Sośnia was formerly part of the German Empire. In the German Empire, the place was called Susnia.
The place is now called Suśnia and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Susnia | German Empire | Koschmin | before the Versailles Treaty |
| Suśnia | Poland | Krotoszyn | after the Versailles Treaty |
| Susnia | German Empire | Krotoschin | 1939 |
| Suśnia | Poland | Krotoszyn | 1945 |
| Sośnia | Poland | Krotoszyn | 1945 |
| Suśnia | Poland | Kalisz | 1992 |