Question: Who is the maternal grandfather of Richard, Count Of Étampes?
Sentence (from "Richard, Count of Étampes"): Richard, Count of Montfort, Vertus and Étampes (c. 1396 – 2 June 1438) was the eighth child and youngest son of John IV, Duke of Brittany, and his third wife, Joan of Navarre.
Relevant evidence: Yes