thelbald, d. 860, king of Wessex, son of Ęthelwulf. During his fathers pilgrimage to Rome (855-56), Ęthelbald ruled, and in 856 he led a group who refused to receive Ęthelwulf as king. Ęthelwulf left Wessex to his son and resumed his reign over Kent, Surrey, Sussex, and Essex. After Ęthelwulfs death, in 858, Ęthelbald married his fathers widow, Judith of France. At his death Ęthelbald was succeeded by his brother Ęthelbert. [The Illustrated Columbia Encyclopedia, 3rd ed., 1969]
He married his step-mother. [GADD.GED]
King of Wessex 858-860. [ROWLEYHR.GED]
Additional information: Britannia.com