Cosmartidene , a concubine of Artaxerxes I associated with King of Persia and Egypt Artaxerxes I Longimanus Achaemenid, son of King of Persia and Egypt Xerxes I Achaemenid and Amestris of Persia, 0476 B.C; His 3rd.2 She was born 0491 B.C. In circa, Babylon.3 She was Babylonian.4 Child of Cosmartidene , a concubine of Artaxerxes I and King of Persia and Egypt Artaxerxes I Longimanus Achaemenid: King of Persia and Egypt Darius II Nothus Achaemenid+ b. 0475 B.C., d. 0404 B.C. [S197] Toby Dills, "A Descendant of Antiquity," gedcom file from e-mail address (e-mail address ) to Robert Stewart, 5 Feb 1999. Hereinafter cited as "Descendant of Antiquity". [S204] Roderick W. Stuart, Royalty for Commoners: The Complete Lineage of John of Gaunt, Son of Edward III, Kings of England, and Queen Philippa (.: ., 3rd Ed., 1998), 414-86. Hereinafter cited as RfC. [S583] Ancient Persia, online , for place. Hereinafter cited as Ancient Persia. [S1078] Plato and his dialogues, online . Hereinafter cited as Plato and his dialogues.