Unterdehtow was formerly part of the German Empire. In the German Empire, the place was called Dolní Dehtov.
The place is now called Dolní Dehtov and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Unterdehtow | Austro-Hungary | Königgrätz | before the Treaty of Saint-Germain |
| Dehtov Dolní | Austro-Hungary | Königgrätz | before the Treaty of Saint-Germain |
| Dolní Dehtov | Czechoslovakia | Dvůr Králové nad Labem | after the Treaty of Saint-Germain |
| Unter-Teerhof | German Empire | Königinhof an der Elbe | 1939 |
| Dolní Dehtov | German Empire | Königinhof an der Elbe | 1939 |
| Dolní Dehtov | Czechoslovakia | Dvůr Králové nad Labem | 1945 |
| Dolní Dehtov | Czechoslovakia | Východní Čechy | 1992 |