Question: Who is William Of Montferrat, Count Of Jaffa And Ascalon's mother-in-law?
Sentence (from "Sibylla, Queen of Jerusalem"): Sibylla (French: "Sibylle", c. 1160–1190) was the Countess of Jaffa and Ascalon from 1176 and Queen of Jerusalem from 1186 to 1190.
Relevant evidence: No