BIGTHAN BIGTHANA bĭg’ thən, bĭg’ thə nə (בִּגְתָ֨ן). One of the two eunuchs of Ahasuerus who plotted against the king’s life. Their conspiracy was discovered and revealed by Mordecai (Esth 2:21). He may be the same as BIGTHA of Esther 1:10.