Esther 2:7
And Mordecai had brought up Hadassah (that is, Esther), the daughter of his uncle, because she did not have a father or mother. The young woman was lovely in form and appearance, and when her father and mother had died, Mordecai had taken her in as his own daughter.

Esther 2:10
Esther did not reveal her people or her lineage, because Mordecai had instructed her not to do so.