Aučin was formerly part of the German Empire. In the German Empire, the place was called Ujčín.
The place is now called Ujčín and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Aučin | Austro-Hungary | Klattau | before the Treaty of Saint-Germain |
| Oučín | Austro-Hungary | Klattau | before the Treaty of Saint-Germain |
| Ujčín | Czechoslovakia | Klatovy | after the Treaty of Saint-Germain |
| Autschin | German Empire | Klattau | 1939 |
| Ujčín | German Empire | Klattau | 1939 |
| Ujčín | Czechoslovakia | Sušice | 1945 |
| Ujčín | Czechoslovakia | Klatovy | 1992 |
| Ujčín | Czech Republic | Klatovy | 1993 |