Name Biette Cassinel | ||
Biette Cassinel (1340-1380), was the royal mistress of Charles V of France, from 1360 until 1380. She has been referred to as the first official mistress of a French monarch.
Her brother Ferry Cassinel was bishop of Lodève in 1375, later bishop of Auxerre, and eventually Archbishop of Rheims.
It's rumored John of Montaigu was her son
References
Biette de Cassinel Wikipedia(Text) CC BY-SA