Question: Who is the maternal grandfather of Eleanor Of Brittany (Abbess)?
Sentence (from "Eleanor of Brittany (abbess)"): She was born in England to John II, Duke of Brittany and Beatrice of England, and in 1281 at the age of seven entered Amesbury Abbey, a priory of the Fontevrault order (her first cousin, twice removed, Eleanor, Fair Maid of Brittany is buried there).
Relevant evidence: Yes