He brought up Hadassah - הדשה hadassah signifies a myrtle in Chaldee: this was probably her first or Babylonish name. When she came to the Persian court, she was called Esther, aster, or sitara, which signifies a star in Persian: the name is undoubtedly Persian. Esther was the daughter of Abihail, the uncle of Mordecai, and therefore must have been Mordecai's cousin, though the Vulgate and Josephus make her Mordecai's niece: but it is safest here to follow the Hebrew.
Hadassah, הדסה hădassâh from הדס hădas (“myrtle”) would seem to have been the Hebrew, and Esther the Persian, name of the damsel. Esther is thought to be connected through the Zend with ἀστήρ astēr “star.” But there is not at present any positive evidence of the existence in Old Persian of a kindred word.