King of Northumbria (759-765)
Said by Simeon of Durham to have been "elected by his own people", he came to the throne as a result of the assassination of his predecessor Oswulf. He does not appear to have been related in any way to the previous rulers of Northumbria, and it believed he was probably related to the Moll (and possibly the same person) who is mentioned as a patricius in 757/8. Which indicated some sort of palace coup is the most likely explanation for the events of 759.
Nothing is known of the events of Aethelwald Moll's short reign, other than he was himself driven out of the kingdom by one Alhred in 765.
SOURCES
A Biographical Dictionary of Dark Age Britain by
Ann Williams, Alfred P Smyth and DP Kirby (Seaby 1991)
Historia regum Anglorum et Danorum
by Simeon of Durham