Dictionary

Hadassah

Easton's Dictionary

Myrtle, the Jewish name of Esther (q.v.), Esther 2:7.

Smith's Dictionary

(myrtle), probably the earlier name of Esther. (Esther 2:7)

International Standard Bible Encyclopedia

ha-das'-a (hadhaqqah, "myrtle"): The Hebrew name (Es 2:7) formerly borne by ESTHER (which see).