Jelonek was formerly part of the German Empire. In the German Empire, the place was called Wilhelmshorst.
The place is now called Jelonek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Wilhelmshorst | German Empire | Neustettin | 1939 |
| Jelonek | Under Polish administration | Szczecinek | 1945 |
| Jelonek | Poland | Koszalin | 1992 |