Petronilla of Aquitaine

Petronilla of Aquitaine was a French noble. She was the second daughter of William X of Aquitaine and Aénor of Châtellerault. She was the elder sister of William Aigret and the younger sister of Eleanor of Aquitaine, who was Queen consort of France, later England. She is variously called Alix and Petronilla; she typically went by Alix after her marriage, while Petronilla seems to have been her childhood name.