Zahájí was formerly part of the German Empire. In the German Empire, the place was called Zahájí.
The place is now called Zahájí and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zahaj | Austro-Hungary | Ledeč | before the Treaty of Saint-Germain |
| Zahájí | Austro-Hungary | Ledeč | before the Treaty of Saint-Germain |
| Zahájí | Czechoslovakia | Ledeč nad Sázavou | after the Treaty of Saint-Germain |
| Sahaj | German Empire | Ledetsch an der Sasau | 1939 |
| Zahájí | German Empire | Ledetsch an der Sasau | 1939 |
| Zahájí | Czechoslovakia | Ledeč nad Sázavou | 1945 |
| Zahájí | Czechoslovakia | Východní Čechy | 1992 |