Question: Who is the paternal grandmother of Bertha Of Blois?
Sentence (from "Bertha of Blois"): Bertha of Blois (French: "Berthe de Blois"; c. 1005 — c. 1080), was a Duchess consort of Brittany and a countess consort of Maine, married in 1018 to Alain III, Duke of Brittany, and in 1046 to Hugh IV, Count of Maine.
Relevant evidence: No