Schönsee was formerly part of the German Empire. In the German Empire, the place was called Schönsee.
The place is now called Jeziernik and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Schönsee | German Empire | Marienburg i. Westpr. | before the Versailles Treaty |
| Schönsee | Free City of Danzig | Großes Werder | after the Versailles Treaty |
| Schönsee | German Empire | Großes Werder | 1939 |
| Jeziernik | Poland | Nowy Dwór Gdański | 1945 |
| Jeziernik | Poland | Elbląg | 1992 |