Arda-Mulissu or Arda-Mulissi, also known as Urdu-Mullissi, Urad-Mullissu and Arad-Ninlil and known in Hebrew writings as Adrammelech, was an ancient Assyrian prince of the Sargonid dynasty, the son of
Stele with a depiction of an Assyrian crown prince, dated to Sennacherib's reign. Arda-Mulissu was Sennacherib's longest-serving crown prince but the stele could also depict the earlier Ashur-nadin-shumi or later Esarhaddon.
The Flight of Adrammelech, illustration from Dalziel's Bible Gallery (1881), depicting Arda-Mulissu and Nabu-shar-usur escaping after murdering Sennacherib.
Aššur-nādin-šumi was a son of the Neo-Assyrian king Sennacherib and was appointed by him as the king of Babylon, ruling southern Mesopotamia from 700 BC to his capture and execution by the Elamites in
Confirmation by the later Babylonian king Šamaš-šuma-ukin, Aššur-nādin-šumi's nephew, of a grant originally made by Aššur-nādin-šumi. 670–650 BC. The tablet is currently housed in the British Museum.