Cierznie was formerly part of the German Empire. In the German Empire, the place was called Peterswalde.
The place is now called Cierznie and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Peterswalde (Westpr.) | German Empire | Schlochau | before the Versailles Treaty |
| Peterswalde (Kr. Schlochau) | German Empire | Schlochau | after the Versailles Treaty |
| Peterswalde | German Empire | Schlochau | 1939 |
| Cierznie | Under Polish administration | Człuchów | 1945 |
| Cierznie | Poland | Słupsk | 1992 |