Zielony Lasek was formerly part of the German Empire. In the German Empire, the place was called Grünwalde.
The place is now called Zielony Gaj and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Grünwalde | German Empire | Lötzen | 1939 |
| Zielony Lasek | Under Polish administration | Giżycko | 1945 |
| Zielony Gaj | Poland | Suwałki | 1992 |