NN was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Chełchy-Chabdzyno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Chelchy Chabdzyno | Russian Empire | Makov | 1914 |
| Chełchy-Chabdzyno | Poland | Maków | 1919 |
| NN | German Empire | Mackeim | 1939 |
| Chełchy-Chabdzyno | Poland | Maków Mazowiecki | 1945 |
| Chełchy-Chabdzyno | Poland | Ciechanów | 1992 |