┌─Louis the Pious ⇒
┌─Louis II the Stammerer King of the Franks
│ └─Ermentrude
┌─Charles III the Simple King of the Franks
│ ┌─Æthelwulf of Wessex ⇒
│ ┌─Alfred the Great of Wessex
│ │ └─Osburh
│ ┌─Edward the Elder King of England
│ │ │ ┌─Æthelred Mucel
│ │ └─Ealhswith
│ │ └─Eadburh
└─Ælfflæd