Dziekanow Niemiecki was formerly part of the German Empire. In the German Empire, the place was called Dschekanow Deutsch.
The place is now called Dziekanów Leśny and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Dziekanow Niemiecki | Russian Empire | Varšava | 1914 |
| Dziekanów Niemiecki | Poland | Warszawa | 1919 |
| Dschekanow Deutsch | German Empire | Plöhnen | 1939 |
| Dziekanów Leśny | Poland | Nowy Dwór Mazowiecki | 1945 |
| Dziekanów Leśny | Poland | Warszawa | 1992 |