Guyonne de Laval née Renée de Rieux (1524–1567) was a French suo jure countess of Laval 1547–1567.
[1] She, along with Louis, Prince of Condé (1530–1569), Gaspard II de Coligny and François de Coligny d'Andelot are pointed out as one of the instigators of the famous Surprise of Meaux of 1567.
She served as lady-in-waiting to the queen of France, Eleanor of Austria, in 1533–1547.
Because of her sex, she was forced to share the title and domain with her husband Louis de Sainte-Maure (jure uxoris).
As a response, Guyonne de Laval converted to Calvinism and became one a prominent Huguenot supporter during the French wars of religion.