They had five or six children together, including Edward the Elder who succeeded his father as king; Æthelflæd who became lady of the Mercians; and Ælfthryth who married Baldwin II, Count of Flanders. His mother was Osburga, daughter of Oslac of the Isle of Wight, Chief Butler of England. Asser, in his "Vita Ælfredi" asserts that this shows his lineage from the Jutes of the Isle of Wight. This is unlikely because Bede tells us that they were all slaughtered by the Saxons under Cædwalla.