Kotłow was formerly part of the German Empire. In the German Empire, the place was called Kirchberg.
The place is now called Kotłow and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kotlow | German Empire | Schildberg | before the Versailles Treaty |
| Kotłow | Poland | Ostrów Wielkopolski | after the Versailles Treaty |
| Kirchberg | German Empire | Ostrowo | 1939 |
| Kotłow | Poland | Ostrzeszów | 1945 |
| Kotłow | Poland | Kalisz | 1992 |