Mah or Maonghah is the Avestan language word for both the moon and for the Zoroastrian divinity that presides over and is the hypostasis of the moon.

The names 'Maonghah' and Mah derive from an Indo-European root that is also the origin of the English language word "moon." The Zoroastrian divinity has however no Vedic equivalent. Maonghah retains the name Mah in the 9th-12th century texts of Zoroastrian tradition, and continues with that name into New Persian. In Histories 7.3.7, Herodotus states that the moon was the tutelary divinity of the Iranian expatriates residing in Asia Minor.