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