Unto whom the prince of the eunuchs gave names: for he gave unto Daniel the name of Belteshazzar; and to Hananiah, of Shadrach; and to Mishael, of Meshach; and to Azariah, of Abednego.
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George Leo Haydock
Baltassar, or as Chaldeans (Calmet) or Masorets (Haydock) pronounce, Beltesasar, "the treasurer of Baal. "The names were changed to testify their subjection, (Calmet) and that they might embrace the manners of the Chaldeans. (Menochius)
The new names alluded to the sun. (Calmet)
It was not only the overseer or master of the eunuchs (as others have rendered it, the "chief-eunuch") who changed the names of saints, but also Pharaoh called Joseph in Egypt (Gen. 41) Somtonphanec [Heb.: Zaphenath-paaneah], for neither of them wished them to have Jewish names in the land of captivity. Wherefore the prophet says in the Psalm: "How shall we sing the Lord's song in a strange land?" (Ps. 136:4). Furthermore the Lord Himself changes names benignly, and on the basis of events imposes names of special significance, so as to (p. 497) call Abram Abraham, and Sarai Sarah (Gen. 17). Also in the Gospel, the former Simon received the name of Peter (Mark 3), and the sons of Zebedee are called "sons of thunder"----which is not boanerges, as most people suppose, but is more correctly read benereem [a reading for which there is no manuscript support, but which would be the Hebrew for "sons of thunder"].