Is it der, die or das Ziehvater? – der Ziehvater, plural die Ziehväter

Why is it der Ziehvater?

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

Sense 1

der

[1] Man who takes up children of other parents temporarily or permanently

[1] Mann, der vorübergehend oder dauerhaft Kinder anderer Eltern aufnimmt

[2] Mentor, supportive companion

[2] Mentor, unterstützender Begleiter

[1] The foster father loved his drawing daughter like his own children
[1] Der Ziehvater liebte seine Ziehtochter wie die eigenen Kinder.

[2] The company boss is also a pull father of the project
[2] Der Firmenchef ist zugleich Ziehvater des Projektes.

Dictionary entries include material from Wiktionary. Wiktionary