Arnulf was the son of margrave Baldwin II of Flanders and Ælfthryth of Wessex , daughter of Alfred the Great . Detlev Schwennicke , " " , Neue Folge , Band II ( Verlag von J.
Head entity: alfred the great Q83476 17 18 19
Tail entity: ælfthryth Q1470395 11
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40