Birnbaum was formerly part of the German Empire. In the German Empire, the place was called Birnbaum a. d. Sawe.
The place is now called Hrušica and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Birnbaum | Austro-Hungary | Radmannsdorf/Radovljica | before the Treaty of Saint-Germain |
| Hrušica | Austro-Hungary | Radmannsdorf/Radovljica | before the Treaty of Saint-Germain |
| Hrušica | Yugoslavia | Radovljica | after the Treaty of Saint-Germain |
| Birnbaum a. d. Sawe | German Empire | Radmannsdorf | 1941 |
| Hrušica | Yugoslavia | Kranj | 1945 |
| Hrušica | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| Hrušica | Slovenia | Slowenien | 1991 |