Okiersk was formerly part of the German Empire. In the German Empire, the place was called Öckers.
The place is now called Łosiny and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Okiersk | German Empire | Tuchel | before the Versailles Treaty |
| Loszinni | German Empire | Tuchel | before the Versailles Treaty |
| Okiersk | Poland | Tuchola | after the Versailles Treaty |
| Łosiny | Poland | Tuchola | after the Versailles Treaty |
| Öckers | German Empire | Tuchel | 1939 |
| Okiersk | Poland | Tuchola | 1945 |
| Łosiny | Poland | Tuchola | 1945 |
| Okiersk | Poland | Bydgoszcz | 1992 |
| Łosiny | Poland | Bydgoszcz | 1992 |