Why is it der Halbbruder?

Halbbruder ends in -er, and most nouns ending in -er are masculine: in a German dictionary, 86% of them take der.

All nouns ending in -er
Sense 1
der

Meaning

[1] Blood -related brother of other children only from father or mother

[1] blutsverwandter Bruder anderer Kinder nur von Vater oder Mutter

Examples

[1] "My older half -brother took the matter without complaints as she was" "

[1] „Mein älterer Halbbruder nahm die Sache klaglos so, wie sie kam.“

[1] "With this remark he reminded Henriette that she had a half -brother in Skopun"

[1] „Mit dieser Bemerkung erinnerte er Henriette daran, dass sie einen Halbbruder in Skopun hatte.“
More source examples (1)

These dictionary examples can include historical and less common uses.

[1] "There is a photo of Annie and her father and her half -brother, the three looks directly into the camera"

[1] „Es gibt ein Foto von Annie und ihrem Vater und ihrem Halbbruder, die drei blicken direkt in die Kamera.“

Declension

1 Singular Plural
Nominativ der Halbbruder die Halbbrüder
Genitiv des Halbbruders der Halbbrüder
Dativ dem Halbbruder den Halbbrüdern
Akkusativ den Halbbruder die Halbbrüder

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary