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