Bible dictionaries
Tharra
What Bible dictionaries say about “Tharra”, one article after the other.
International Standard Bible Encyclopedia (ISBE 1915)
thar'-a (Tharra): One of the two eunuchs, "keepers of the court," who with his companion Gabatha (Bigthan) formed a conspiracy against King Artaxerxes which was detected by Mordecai (Additions to Esther 12:1 = "Teresh" of Es 2:21; 6:2). Tharra and his companion were hanged. Josephus (BJ, II, vi, 4) calls him "Theodestes."
International Standard Bible Encyclopedia — James Orr, general editor and contributors; CrossWire SWORD module ISBE 2.2
The article in ISBE 1915Smith’s Bible Dictionary
William Smith; revised by F. N. Peloubet and M. A. Peloubet; CrossWire SWORD module Smith 1.3
The article in Smith