Why is it die Treue?

Treue ends in -e, and most nouns ending in -e are feminine: in a German dictionary, 79% of them take die.

All nouns ending in -e
Sense 1
die

Meaning

[1] Maintaining a attitude to life or a state

[1] Beibehaltung einer Lebenseinstellung oder eines Zustandes

[2] Monogamy in a relationship

[2] Monogamie in einer Beziehung

Examples

[1] I vowed my resolutions loyalty

[1] Ich schwor meinen Vorsätzen Treue!

[2] Many people are very important in a relationship

[2] Vielen Menschen ist Treue in einer Beziehung sehr wichtig.

Declension

1 Singular Plural
Nominativ die Treue —
Genitiv der Treue —
Dativ der Treue —
Akkusativ die Treue —

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary