Question: Who is the mother-in-law of Aveline De Forz, Countess Of Aumale?
Sentence (from "Aveline de Forz, Countess of Aumale"): Aveline de Forz, Countess of Aumale and Lady of Holderness (20 January 1259 – 10 November 1274) was an English noblewoman.
Relevant evidence: No