Question: Who is John Of Hesse-Braubach's maternal grandmother?
Sentence (from "Blanche of Lancaster"): Blanche of Lancaster (25 March 1342 – 12 September 1368) was a member of the English royal House of Plantagenet and the daughter of the kingdom's wealthiest and most powerful peer, Henry of Grosmont, 1st Duke of Lancaster.
Relevant evidence: No