Question: Who is the mother-in-law of Matilda Of Anjou?
Sentence (from "William Adelin"): William Ætheling (5 August 1103 – 25 November 1120), commonly called Adelin, sometimes "AdelinusAdelingusA(u)delin" or other Latinised Norman-French variants of "Ætheling", was the son of Henry I of England by his wife Matilda of Scotland, and was thus heir apparent to the English throne.
Relevant evidence: Yes