Cudnochy was formerly part of the German Empire. In the German Empire, the place was called Siebenhöfen (Ostpr.).
The place is now called Cudnochy and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zudnochen | German Empire | Sensburg | 1938 |
| Siebenhöfen (Ostpr.) | German Empire | Sensburg | 1939 |
| Cudnochy | Under Polish administration | Mrągowo | 1945 |
| Cudnochy | Poland | Suwałki | 1992 |