THASSI

thas'-i (Codex Venetus Thassei; Codex Vaticanus Thassis): The surname of Simon, the brother of Judas Maccabeus (1 Macc 2:3; Syriac "Tharsi"). It is uncertain what the name means, perhaps "director" or "guide," since Simon was "a man of counsel," or "the zealous."

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.