Aethelred Aethelwulfson (1660-1708) was a thegn of King Cynric II of Middlemarch in the Seven Kingdoms. He was the father of Edward Aethelredson and the ruler of Stanlaw from the family's ancestral hall at Maerwynneshyht.
In 1708, Penwulf Cynricson, the heir to the Middlemarch throne, felt his father had failed in his duties and tried to claim the throne. Aethelred was a sworn thegn to Cynric, and Edward a sworn thegn to Penwulf. In the Battle of Raecford, Edward fulfilled his duties to Penwulf and Aethelred fulfilled his to Cynric. During the battle, Edward killed Aethelred.