Answer
The mother of Nabonidus, the last ruler of the Neo-Babylonian Empire, was Queen Adad-guppi, an Assyrian princess, the daughter of King Ashurbanipal. As a result of her royal lineage, Adad-guppi was likely well-educated, and possibly played a role in political and diplomatic affairs during the reign of her husband, Nebuchadnezzar II, and her son Nabonidus.