Kotomierz was formerly part of the German Empire. In the German Empire, the place was called Klarheim.
The place is now called Kotomierz and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Klahrheim | German Empire | Bromberg | before the Versailles Treaty |
| Kotomierz | Poland | Bydgoszcz | after the Versailles Treaty |
| Klarheim | German Empire | Bromberg | 1939 |
| Kotomierz | Poland | Bydgoszcz | 1945 |
| Kotomierz | Poland | Bydgoszcz | 1992 |