Kajęcin was formerly part of the German Empire. In the German Empire, the place was called Kainzen.
The place is now called Kajęcin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kainzen | German Empire | Guhrau | 1939 |
| Kajęcin | Under Polish administration | Góra | 1945 |
| Kajęcin | Poland | Leszno | 1992 |