Kierno was formerly part of the German Empire. In the German Empire, the place was called Körnen.
The place is now abandoned and the area belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Körnen | German Empire | Preußisch Eylau | 1939 |
| Kierno | Under Polish administration | Górowo Iławeckie | 1945 |
| - aufgelassen - | Russian Federation | Bagrationovsk | 1992 |