Zoroaster Thus they accorded the same treatment to the Zoroastrian people which they did to other "People of the Book". Though the name of Zoroaster is not mentioned in the Qur'an, still he was regarded as one of those prophets whose names have not been mentioned in the Qur'an, for there is a verse in the Qur'an: "And We did send apostles before thee: there are some of them that We have mentioned to thee and there are others whom We have not mentioned to Thee." (40 : 78). Accordingly, the Muslims treated the founder of Zoroastrianism as a true prophet
Medes of the Indo-Iranian word "arta-" (lit. "truth") which is familiar from both Avestan and Old Persian and also examples of theophoric names containing "Maždakku" and also the name "Ahura Mazdā". Scholars disagree whether these are indications of Zoroastrian religion amongst the Medes. Diakonoff believes that "Astyages and perhaps even Cyaxares had already embraced a religion derived from the teachings of Zoroaster" which was not identical with doctrine of Zarathustra and Mary Boyce believes that "the existence of the Magi in Media with their own traditions and forms of worship was an obstacle to Zoroastrian proselytizing there". Boyce wrote that the