Bigthan in Fausset's Bible Dictionary

Persian and Sanskrit, Bagadana, "gift of fortune" (Esther 2:21; Esther 6:2). "Wroth," because degraded at the same time as Queen Vashti, and a keeper of the door, Bigthan with Teresh "sought to lay bands on Ahasuerus." Detected by Mordecai, he was hanged. The Septuagint states that the conspirators' cause of wrath was Mordecai's advancement; but Mordecai was not advanced until subsequently, in reward for detecting the conspiracy (Esther 6).