One of the seven great houses of the Parthian Empire (which ruled parts of Persia from 247 BC–224 AD) was the House of Mihran. I believe the blood line of the magi can be traced through these houses and especially Mihran due to their coming from the city of Ray in modern Iran; also called Rhaga.
This city was the ancient home of the Median Empire of old. According to the Histories of Herodotus, there were six Median tribes:
Thus Deioces collected the Medes into a nation, and ruled over them alone. Now these are the tribes of which they consist: the Busae, theParetaceni, the Struchates, the Arizanti, the Budii, and the Magi.
The Median Tribes resided in the area in the triangle of between Ecbatana, Rhagae and Aspadana.
The Torah (Jewish holy book) claimed Ray is one door of the Earth and the people of the world go there for their commercial affairs. According to the Avesta (sacred book of the Zoroastrians), Ray was a famous base of the Zoroastrian priests and the religious center of Zoroastrians before Islam. It was considered their holy city for some historians believed Zoroaster’s mother was a native of Ray; called Reyeh in the Avesta. It is interesting that the mother of Zoroaster, the patriarch of the Zoroastrian religion, claimed an area of which the Magi factored prominently.
What is even more interesting is the fact that the city of Ray is today known as the Iranian capital of Tehran.