Ignaców was formerly part of the German Empire. In the German Empire, the place was called Irmenfeld.
The place is now called Ignaców and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ignacow | German Empire | Schildberg | before the Versailles Treaty |
| Ignaców | Poland | Kępno | after the Versailles Treaty |
| Irmenfeld | German Empire | Kempen (Wartheland) | 1939 |
| Ignaców | Poland | Ostrzeszów | 1945 |
| Ignaców | Poland | Kalisz | 1992 |