'Daughter' in the Bible

He was raising Hadassah, that [is] Esther, his uncle's daughter, for she did not have a father or a mother; the young woman [had] a beautiful figure and [was] very attractive. When her father and mother died, Mordecai had taken her as his daughter.

When the turn came near for Esther daughter of Abihail the uncle of Mordecai, who had taken [her] as a daughter, to go to the king, she did not ask anything except what Hegai the eunuch of the king who was in charge of the women, advised. And Esther carried favor in the eyes of everyone that saw her.

So Queen Esther the daughter of Abihail and Mordecai the Jew wrote in full authority to confirm this second letter of Purim.