Sinetsch was formerly part of the German Empire. In the German Empire, the place was called Syneč.
The place is now called Syneč and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sinetsch | Austro-Hungary | Böhmisch-Brod | before the Treaty of Saint-Germain |
| Sineč | Austro-Hungary | Böhmisch-Brod | before the Treaty of Saint-Germain |
| Syneč | Czechoslovakia | Český Brod | after the Treaty of Saint-Germain |
| Sinetsch | German Empire | Böhmisch-Brod | 1939 |
| Syneč | German Empire | Böhmisch-Brod | 1939 |
| Syneč | Czechoslovakia | Český Brod | 1945 |
| Syneč | Czechoslovakia | Střední Čechy | 1992 |