Friedenau was formerly part of the German Empire. In the German Empire, the place was called Frýdnava.
The place is now called Frýdnava and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Friedenau | Austro-Hungary | Časlau | before the Treaty of Saint-Germain |
| Frydnava | Austro-Hungary | Časlau | before the Treaty of Saint-Germain |
| Frýdnava | Czechoslovakia | Čáslav | after the Treaty of Saint-Germain |
| Friedenau | German Empire | Tschaslau | 1939 |
| Frýdnava | German Empire | Tschaslau | 1939 |
| Frýdnava | Czechoslovakia | Čáslav | 1945 |
| Frýdnava | Czechoslovakia | Východní Čechy | 1992 |