Æthelwald Moll was King of Northumbria, the historic petty kingdom of Angles in medieval England, from 759 to 765.
He seized power after the murder of Oswulf son of Eadberht; his ancestry and connection to the royal family of Northumbria is unknown.
In 765 a Witenagemot of Northumbrian notables deposed Æthelwald and replaced him with Alhred, a kinsman of his predecessor.
Whether he was a descendant of the Deiran dynasty of Ælle, or simply a member of a powerful noble family, is unknown.
The Anglo-Saxon Chronicle and Symeon of Durham's Historia Regum supply more details, recording that Oswine, "a most noble ætheling", was killed fighting against Æthelwald on 6 August 761 in the Eildon Hills.