Gadomiec Jedrzejki was formerly part of the German Empire. In the German Empire, the place was called Gadomiec Jedrzejki.
The place is now called Gadomiec-Jędrzejki and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Gadomiec Jedrzejki | Russian Empire | Prasnyš | 1914 |
| Gadomiec-Jędrzejki | Poland | Przasnysz | 1919 |
| Gadomiec Jedrzejki | German Empire | Praschnitz | 1939 |
| Gadomiec-Jędrzejki | Poland | Przasnysz | 1945 |
| Gadomiec-Jędrzejki | Poland | Ostrołęka | 1992 |