Question: Who is Margaret Of Sicily, Countess Palatine Of The Rhine's mother-in-law?
Sentence (from "Margaret of Sicily, Countess Palatine of the Rhine"): Margaret of Sicily or Margherita di Sicilia-Aragona (1331 in Palermo – 1377 in Neustadt) was a Sicilian princess, daughter of the King Frederick III of Sicily and his wife Eleanor of Anjou.
Relevant evidence: No