Jaskółczyn was formerly part of the German Empire. In the German Empire, the place was called Hammer.
The place is now called Jaskółczyn and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Hammer | German Empire | Weststernberg | 1939 |
| Jaskółczyn | Under Polish administration | Rzepin | 1945 |
| Jaskółczyn | Poland | Zielona Góra | 1992 |