One of these families produced the Achaemenian dynasty of kings, the royal line from which came the founder of the Persian Empire, Cyrus the Great.
... Cyrus, who, according to Herodotus and Xenophon, was born of a Persian father and a Median mother, united the Persians under his leadership. (Herodotus, I, 107, 108; Cyropaedia, I, ii, 1)