Question: Who is William Of Montferrat, Count Of Jaffa And Ascalon's mother-in-law?
Sentence (from "William of Montferrat, Count of Jaffa and Ascalon"): The earliest surviving mention of William's epithet, "Longsword", said to refer to his military abilities, and differentiating him from his father, known as "William the Elder", is in the song "
Relevant evidence: No