Question: Who is William Iv, Duke Of Aquitaine's maternal grandmother?
Sentence (from "Gerloc"): Gerloc (or Geirlaug), baptised in Rouen as Adela (or Adèle) in 912, was the daughter of Rollo, of Normandy, Count of Rouen, and his wife, Poppa of Bayeux.
Relevant evidence: Yes