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