Jęcznik was formerly part of the German Empire. In the German Empire, the place was called Davidshof.
The place is now called Jęcznik and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Davidshof | German Empire | Ortelsburg | 1939 |
| Jęcznik | Under Polish administration | Szczytno | 1945 |
| Jęcznik | Poland | Olsztyn | 1992 |