Æthelwulf of Wessex
He was a son of Baldwin II, Count of Flanders, and of Ælfthryth, daughter of Alfred the Great. He was probably named for his maternal great-grandfather, King Æthelwulf of Wessex. Baldwin II's extensive lands and many offices in what is now the north of modern France and the west of Belgium were divided among his sons on his death in 918. The elder, Arnulf, became Count of Flanders while Adelolf succeeded his father as count of Saint-Pol, Count of Boulogne and of Thérouanne. He was also the lay abbot of the Abbey of Saint Bertinus (Saint-Bertin) at Saint-Omer.