Jastrzębiec was formerly part of the German Empire. In the German Empire, the place was called Buschvorwerk.
The place is now called Krzewiny and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Buschvorwerk | German Empire | Freystadt i. Niederschles. | 1939 |
| Jastrzębiec | Under Polish administration | Kożuchów | 1945 |
| Krzewiny | Poland | Zielona Góra | 1992 |