Question: Who is Ælfgifu Of York's mother-in-law?
Sentence (from "Æthelred the Unready"): Æthelred II (Old English: "Æþelræd", ; 966 – 23 April 1016), known as the Unready, was King of the English from 978 to 1013 and again from 1014 until his death.
Relevant evidence: No