Blendowko was formerly part of the German Empire. In the German Empire, the place was called Blendowko.
The place is now called Błędówko and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Bledowko | Russian Empire | Plonsk | 1914 |
| Błędówko | Poland | Płońsk | 1919 |
| Blendowko | German Empire | Plöhnen | 1939 |
| Błędówko | Poland | Nowy Dwór Mazowiecki | 1945 |
| Błędówko | Poland | Warszawa | 1992 |