Atoosa :the daughter of Cyrus the Great
Xerxes I was the eldest son of Atossa and Darius. Atossa lived to see Xerxes invade Greece. Being a direct descendant of Cyrus the Great, Atossa had a great authority within Achamenian imperial house and court. Atossa's special position enabled Xerxes, who was not the eldest son of Darius, to succeed his father.