Redykajny was formerly part of the German Empire. In the German Empire, the place was called Redigkainen.
The place is now called Redykajny and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Redigkainen | German Empire | Allenstein | 1939 |
| Redykajny | Under Polish administration | Olsztyn | 1945 |
| Redykajny | Poland | Olsztyn | 1992 |