Janowo was formerly part of the German Empire. In the German Empire, the place was called Janau.
The place is now called Janowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Janowo | German Empire | Wreschen | before the Versailles Treaty |
| Janowo | Poland | Września | after the Versailles Treaty |
| Janau | German Empire | Wreschen | 1939 |
| Janowo | Poland | Słupca | 1945 |
| Janowo | Poland | Konin | 1992 |