According to a "strict philology" methodology that relies only on etymological and grammatical evidence, the genenis of Airyaman lies in a Younger Avestan exegesis of the Gathic "airyaman ishyo" prayer. The proper noun was misconstrued to be an invocation of a divinity named Airyaman, who became the "yazata" of healing because the prayer was identified with healing (for example, eulogized in "Yasna" 3 as "the greatest of manthras against sickness"). While it was accepted that the Avestan common noun "airyaman" and Vedic "aryaman-" both indicate a type of social group, that 'Avestan Airyaman is a chimera ... would have been determined long ago if a Vedic divinity of this name ... had not confused the issue.'