Great post, MCWAY! Thank you!
You're welcome. That blurb was just part of three accusations by Biblical skeptics that the book of Daniel wasn't accurate and thus was written late (especially given the prophetic material within the book itself).
Skeptic claim #1: Belshazzar didn't exist and was a figment of the alleged anonymous writer's mind - FALSE
Skeptic claim #2: (once #1 got smashed to bits) Belshazzar (Belly, for short) was never king - FALSE
And now....
Skeptic claim #3: Nebuchadnezzar was not Belly's father:
The book of Daniel does refer to Nebuchadnezzar (Nebby, for simplicity's sake) as Belly's father. Outside sources cite Belshazzar's father as Nabonidus. A conflict? Hardly!!!
Keep in mind that, in ancient cultures (especially in Hebrew) the word, "Father" means ancestor and is not limited to a first-generation biological parent. Jacob refers to Abraham as his father, as did many Hebrews.
In terms of royalty, a preceding king has often been referred as the "father" of a current king, with relation to the throne, whether there's an actual blood relation or not.
So, describing Nebby as Belly's father is quite accurate in those context. Furthermore, many Biblical scholars suggest that Nebby was actually Belly's maternal grandfather, which would make the term, "father", even more valid.
Historically, after Nebuchadnezzar, came his son, Evil-Merodach. He ruled Babylon for two years, before being killed by his brother-in-law, Neglissar.
Neglissar ruled for 4 years, before dying. His yound son, Labashi-Merodach was on the throne for a few months, before he was killed. Nabonidus usurped the throne but three years later, he bailed and put Belshazzar in charge.
The writing-on-the-wall incident predicts that the Medes and Persians would conquer and destroy Babylon. That's why Daniel refuses the title of third-highest ruler of Babylon (that was like being name VP of Enron).
You will recall a prophecy in Jeremiah 27, that states that the nations of the world would serve Nebuchadnezzar, his son, and his grandson, until the time of his end comes. Based on the historical account, that would mean that Nebby would rule, followed by his son (Evil-Meradoch) and his grandson (Belshazzar), until the time of his end comes (Medes and Persians conquer Babylon).
Score one more for Biblical accuracy!