Exception
-e die
Usually 85.6% of the 2,894 common nouns ending in -e take die.
Kunde breaks this rule: it is der Kunde, not die Kunde.
Masculine -e nouns are mostly people and animals (der Junge, der Kollege, der Löwe). Learn der Name and der Käse as pairs.
Other exceptions der Glaube, der Junge, das Ende, der Name