Janowo was formerly part of the German Empire. In the German Empire, the place was called Hauswald.
The place is now called Janowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Janowo | German Empire | Rawitsch | before the Versailles Treaty |
| Janowo | Poland | Rawicz | after the Versailles Treaty |
| Hauswald | German Empire | Rawitsch | 1939 |
| Janowo | Poland | Rawicz | 1945 |
| Janowo | Poland | Leszno | 1992 |