Edward , the elder , was the son of Æthelflæd , daughter of Ordmær , the younger was Æthelred , son of Ælfthryth , daughter of Ordgar .
Head entity: ælfthryth Q2746341 22
Tail entity: æthelred Q183499 18
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P25