Question: What is the date of death of William Howard, 3Rd Baron Howard Of Effingham's mother?
Sentence (from "William Howard, 3rd Baron Howard of Effingham"): Howard married Ann St John, daughter of John St John, 2nd Baron St John of Bletso, on 7 February 1597: they had one daughter, Elizabeth (1603–1671), who married John Mordaunt, 1st Earl of Peterborough.
Relevant evidence: No