Cambyses passed a sleepless night.

The feeling of jealousy, so totally new to him, increased his desire to possess Nitetis, but he dared not take her as his wife yet, as the Persian law forbade the king to marry a foreign wife, until she had become familiar with the customs of Iran and confessed herself a disciple of Zoroaster.
[Zoroaster, really Zarathustra or Zerethoschtro, was one of the `greatest among founders of new religions and lawgivers.

His name signified "golden star" according to Anquetil du Perron.

But this interpretation is as doubtful, as the many others which have been attempted.

An appropriate one is given in the essay by Kern quoted below, from zara golden, and thwistra glittering; thus "the gold glittering one." It is uncertain whether he was born in Bactria, Media or Persia, Anquetil thinks in Urmi, a town in Aderbaijan.