Marduk-nadin-ahi

https://en.wikipedia.org/wiki/Nebuchadnezzar_II

The known sons of Nebuchadnezzar are:

Marduk-nadin-ahi (Akkadian: Marduk-nādin-aḫi)[88] – the earliest attested of Nebuchadnezzar's children, attested in a legal document, probably as an adult as he is described as being in charge of his own land, already in Nebuchadnezzar's third year as king (602/601 BC). Presumably Nebuchadnezzar's firstborn son, if not eldest child, and thus his legitimate heir.[90] He is also attested very late in Nebuchadnezzar's reign, named as a "royal prince" in a document recording the purchase of dates by Sin-mār-šarri-uṣur, his servant, in 563 BC.[89][82]