Rusko was formerly part of the German Empire. In the German Empire, the place was called Adlershorst (Kr. Jarotschin).
The place is now called Rusko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rusko (Bz. Posen) | German Empire | Jarotschin | before the Versailles Treaty |
| Rusko | Poland | Jarocin | after the Versailles Treaty |
| Rusko | German Empire | Jarotschin | 1939 |
| Adlershorst (Kr. Jarotschin) | German Empire | Jarotschin | 1939 |
| Rusko | Poland | Jarocin | 1945 |
| Rusko | Poland | Kalisz | 1992 |