Kozojídky was formerly part of the German Empire. In the German Empire, the place was called Kozojídky.
The place is now called Kozojídky and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Klein-Kozojed | Austro-Hungary | Neubydžow | before the Treaty of Saint-Germain |
| Malé Kozojedy | Austro-Hungary | Neubydžow | before the Treaty of Saint-Germain |
| Kozojídky | Austro-Hungary | Neubydžow | before the Treaty of Saint-Germain |
| Kozojídky | Czechoslovakia | Nový Bydžov | after the Treaty of Saint-Germain |
| Klein-Kosojed | German Empire | Neu-Bidschow | 1939 |
| Kozojídky | German Empire | Neu-Bidschow | 1939 |
| Kozojídky | Czechoslovakia | Nový Bydžov | 1945 |
| Kozojídky | Czechoslovakia | Východní Čechy | 1992 |