Countess Jeanne of Valois was a French noblewoman born in 1343. She was a member of the House of Valois, a prominent royal family in France. Jeanne was the daughter of Charles IV of France and Jeanne d'Évreux. Her lineage connected her to significant political alliances during the late medieval period. In 1360, Jeanne married William I, Count of Hainaut, which strengthened ties between France and the County of Hainaut. Throughout her life, she played a role in the political landscape of her time, contributing to the stability and influence of her family's legacy in European history.