Airyaman

In the Avesta, (or ) is both an Avestan language common noun as well as the proper name of a Zoroastrian divinity.The common noun is a theological and social term literally meaning "member of (the) community or tribe." In a secondary development, the common noun became the proper name of a divinity Airyaman, who is the yazata of health and healing.[*]In Zoroastrian tradition, Avestan Airyaman is Middle Persian Erman (Ērmān).
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[Persian] The Persian god of friendship and healing. A philosophical concept personified as a god.

Airyaman (Persian) The divine aspect of Ahriman (the personification of evil in the Zoroastrian system) before he "became a dark opposing power, a Satan. For Ahriman is of the same essence with Ahura Mazda, just as Typhon-Seth is of the same essence with Osiris" (TG 12). He is invoked in the Airyama-ishyo. {SD 2:517}