Question: Who is Brian Of Brittany's paternal grandmother?
Sentence (from "Odo, Count of Penthièvre"): Eozen married Agnes of Cornouaille (Orguen Kernev), the daughter of Alan Canhiart, Count of Cornouaille and sister of Hoel II, Duke of Brittany who was married in 1066 to Eozen's niece Hawise, Duchess of Brittany.
Relevant evidence: No