Why is it der Ostberliner?
Ostberliner is a compound noun, and German compounds take the article of their last word: der Berliner. So it’s der Ostberliner.
der
Meaning
[1] person who comes from one of the eastern districts of Berlin and/or lives there
[1] Person, die aus einem der östlichen Stadtbezirke von Berlin stammt und/oder dort lebtExamples
[1]
[1]
Declension
| 1 | Singular | Plural |
|---|---|---|
| Nominativ | der Ostberliner | die Ostberliner |
| Genitiv | des Ostberliners | der Ostberliner |
| Dativ | dem Ostberliner | den Ostberlinern |
| Akkusativ | den Ostberliner | die Ostberliner |
Pronunciation
Dictionary entries include material from Wiktionary. Wiktionary