Lubosz was formerly part of the German Empire. In the German Empire, the place was called Bardtensee.
The place is now called Lubosz and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Lubosch | German Empire | Birnbaum | before the Versailles Treaty |
| Lubosz | Poland | Międzychód | after the Versailles Treaty |
| Lubosch | German Empire | Birnbaum (Wartheland) | 1939 |
| Bardtensee | German Empire | Birnbaum (Wartheland) | 1939 |
| Lubosz | Poland | Międzychód | 1945 |
| Lubosz | Poland | Poznań | 1992 |