Amestris or Amastris (Friend in Old Persian) was the wife of Xerxes I of Persia, mother of king Artaxerxes I of Persia.[1] She was known to have had an extremely poor reputation among the ancient Greek historians.[2][3][4]Amestris was the daughter of Otanes, one of the seven conspirators who killed the Persian rebel king Gaumâta (September 22, 522 BCE). After this, Darius I the Great of Persia started his reign. According to the Greek researcher Herodotus (5th century BC), Otanes was honored with a diplomatic marriage. The new king married Otanes' daughter Phaedymia, and Otanes married a sister of Darius, who gave birth to Amestris.
When Darius died in 486 BC, Amestris was married to the crown prince, Xerxes, and must have been in her thirties. Herodotus describes Queen consort Amestris as a cruel despot:
I am informed that Amestris, the wife of Xerxes, when she had grown old, made return for her own life to the god who is said to be beneath the earth by burying twice seven children of Persians who were men of renown.