Jaszcerz was formerly part of the German Empire. In the German Empire, the place was called Eschenbruch.
The place is now called Jasieniec and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jaschiersk | German Empire | Schwetz | before the Versailles Treaty |
| Jaschinnitz | German Empire | Schwetz | before the Versailles Treaty |
| Jaszcerz | Poland | Świecie | after the Versailles Treaty |
| Jasiniec | Poland | Świecie | after the Versailles Treaty |
| Eschenbruch | German Empire | Schwetz (Weichsel) | 1939 |
| Jaszczerz | Poland | Starogard Gdański | 1945 |
| Jasieniec | Poland | Starogard Gdański | 1945 |
| Jaszczerz | Poland | Gdańsk | 1992 |
| Jasieniec | Poland | Gdańsk | 1992 |