Ahura Mazda ( ə-HOOR-ə MAZ-də), also known as Ormazd and Horomazes, is the principal God and sky deity in Zoroastrianism. He is the first and most frequently invoked spirit in the Yasna. The literal meanings of the words Ahura and Mazda are "lord" and "wisdom", respectively.

The first notable invocation of Ahura Mazda occurred during the Achaemenid period (c. 550–330 BC) with the Behistun Inscription of Darius the Great. Until the reign of Artaxerxes II (c. 405/404–358 BC), Ahura Mazda was worshipped and invoked alone in all extant royal inscriptions. With Artaxerxes II, Ahura Mazda was gathered into a triad of deities with Mithra and Anahita. In the Achaemenid period, the only known representation of Ahura Mazda at the royal court was an empty chariot drawn by white horses, which was used to invite Ahura Mazda to accompany the Persian army into battle.

Ahura Mazda was depicted in images starting from the 5th century BC, but during the Sassanid period, these depictions were replaced by stone-carved figures—and eventually removed entirely—due to an iconoclastic movement supported by the Sasanian dynasty.

Ahura Mazda
CNG Coins · CC BY-SA 3.0 via Wikimedia Commons

Nomenclature

The most likely etymology is from Proto-Indo-European *h₂ḿ̥suros, from *h₂ems- ("to engender, beget"), and therefore it is cognate with Sanskrit ásura and Proto-Germanic *ansuz. Finnish Indologist Asko Parpola locates a borrowing from Proto-Indo-Aryan *asera- to the Uralic languages, with the meaning 'lord, prince'.

'Mazda', or rather the Avestan stem-form Mazdā-, nominative Mazdå, reflects Proto-Iranian *mazdáH (a feminine noun). It is generally taken to be the proper name of the spirit and, like its Vedic cognate medhā́, means "intelligence" or "wisdom". Both the Avestan and the Sanskrit words reflect Proto-Indo-Iranian *mazdʰáH, from Proto-Indo-European *mn̥sdʰh₁éh₂, literally meaning "placing (*dʰeh₁) one's mind (*mn̥-s)", hence "wise".

In Old Persian, during the Achaemenid era, the name was either depicted using the cuneiform logograms 𐏈 or 𐏉 (genitive 𐏊), or spelled out as 𐎠𐎢𐎼𐎶𐏀𐎭𐎠 (a-u-r-m-z-d-a, Auramazdā). In Parthian, the name was written as 𐭀𐭇𐭅𐭓𐭌𐭆𐭃 (ʾḥwrmzd, Ahurmazd), while 𐭠𐭥𐭧𐭥𐭬𐭦𐭣𐭩 (ʾwhrmzdy, Ōhramazdē) was the Middle Persian term used during the Sassanid era.