Question: Who is Thomas De Monthermer, 2Nd Baron Monthermer's maternal grandmother?
Sentence (from "Thomas de Monthermer, 2nd Baron Monthermer"): Thomas de Monthermer, 2nd Baron Monthermer (4 October 1301 – 24 June 1340) was the son of Ralph de Monthermer, 1st Baron Monthermer and Joan of Acre, the daughter of King Edward I of England.
Relevant evidence: Yes