Question: how was belshazzar related to nebuchadnezzar?
Answer: The story of Belshazzar's feast is historical fiction, and several details are not consistent with historical facts. Belshazzar is portrayed as the king of Babylon and "son" of Nebuchadnezzar, though he was actually the son of Nabonidus—one of Nebuchadnezzar's successors—and he never became king in his own right.