Grammatically, the term Ahura Mazda is both masculine and feminine. Ahura (the being, the essence) is masculine, and Mazda (the source of wisdom, the super wisdom), is feminine. It is a perfect grammatical construction: a God who is both masculine and feminine, representing the strict equality of men and women which is one of the bases of the Zoroastrian system.

The Gathas: The Sublime Book of Zarthustra by Khosro Khazai