Question: Who is the mother-in-law of Margaret, Countess Of Anjou?
Sentence (from "Charles, Count of Valois"): Charles of Valois (12 March 1270 – 16 December 1325), the third son of Philip III of France and Isabella of Aragon, was a member of the House of Capet and founder of the House of Valois, whose rule over France would start in 1328.
Relevant evidence: Yes