WordNet (r) 3.0 (2006):

Nebuchadrezzar
    n 1: (Old Testament) king of Chaldea who captured and destroyed
         Jerusalem and exiled the Israelites to Babylonia (630?-562
         BC) [syn: Nebuchadnezzar, Nebuchadnezzar II,
         Nebuchadrezzar, Nebuchadrezzar II]

Easton's 1897 Bible Dictionary:

Nebuchadrezzar
   =Nebuchadnezzar (Jer. 21:2, 7; 22:25; 24:1, etc.), a nearer
   approach to the correct spelling of the word.