Abednego was the Aramaic name given to Azariah when taken captive by the Babylonians about 605 BCE. The name Abednego is equivalent to servant of Nego or Nebo, the Babylonian god of wisdom and connected to the planet Mercury. He was one of the three Hebrew youths, other two Shadrach and Meshach, who were companions to Daniel, and helped convert Nebuchadnezzar and the nation to Judaism after escaping the fiery furnace in which they were imprisoned (Dan. 1:7, sq.). BCE. A.G.H.
Unger, Merrill F., Unger’s Bible Dictionary, Chicago, Moody Press, 1966, p. 2