Kajew was formerly part of the German Empire. In the German Empire, the place was called Pappelau.
The place is now called Kajew and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kajew | German Empire | Pleschen | before the Versailles Treaty |
| Kajew | Poland | Jarocin | after the Versailles Treaty |
| Pappelau | German Empire | Jarotschin | 1939 |
| Kajew | Poland | Pleszew | 1945 |
| Kajew | Poland | Kalisz | 1992 |