Was the second son of Aethelwulf. His elder brother, Athelstan, who had acted as sub-king in Kent, Essex, Surrey, and Sussex, died c.850. Aethelbald took over the kingship of Wessex when his father made a protracted visit to Rome 855–6, though Asser hints at a conspiracy to oust the old king completely. On Aethelwulf's death in 858, Aethelbald married his young widow, Judith, which Asser declared to be a disgrace. Aethelbald died in 860 and was buried at Sherborne.
From The Kings and Queens of Britain in Oxford Reference.
Subjects: British History.