Belshazzar
Belshazzar, the last Emperor of Babylon, is mentioned in the book of Daniel as the son of Nebuchadnezzar (though historically known as the son of Nabonidus).
Belshazzar was the co-regent of Babylon and the last royal figure of the Babylonian Empire encountered in the book of Daniel, described as the son of Nebuchadnezzar (Daniel 5:1). During a great feast at which he desecrated the sacred vessels taken from the Jerusalem temple, a mysterious hand wrote on the wall: MENE, MENE, TEKEL, PARSIN—words Daniel interpreted as divine judgment announcing the end of Belshazzar's kingdom. That very night Belshazzar was slain, and Darius the Mede received the kingdom (Daniel 5:30–31). Historically, Belshazzar was the son of Nabonidus and served as regent while his father campaigned in Arabia.