Letky was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called NN and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Lettek | Austro-Hungary | Smichow | before the Treaty of Saint-Germain |
| Letky | Austro-Hungary | Smichow | before the Treaty of Saint-Germain |
| Letky | Czechoslovakia | Smíchov | after the Treaty of Saint-Germain |
| Letek | German Empire | Prag | 1939 |
| NN | German Empire | Prag | 1939 |
| Letky | Czechoslovakia | Praha-západ | 1945 |
| - aufgelassen - | Czechoslovakia | Praha-západ | 1992 |
| NN | Czech Republic | Praha-západ | 1993 |