Question: Who is Louis Iii, Count Of Blois's maternal grandmother?
Sentence (from "Louis III, Count of Blois"): Louis III of Châtillon (died 1372), son of Louis II, Count of Blois and Jeanne of Hainault, was count of Blois and lord of Avesnes 1346–1372, and count of Soissons 1346–1367.
Relevant evidence: Yes