Biette de Cassinel
Biette Cassinel, was the chief mistress of Charles V of France from 1360 until 1380. She has been referred to as the first official mistress of a French monarch.
She was the daughter of the François Cassinel, sergent d'armes of John II of France, and Alix Deschamps. She was the sister of Ferry Cassinel, bishop of Lodève, bishop of Auxerre, and eventually Archbishop of Rheims. She married Gérard de Montagu in 1336 and became the mother of a future Bishop of Paris, Gerard, and chancellor, Jean de Montagu. It its rumored that she was the mother of John of Montaigu was her son by Charles V, as well as Oudard d'Attainville.
