List of Famous people named Petronilla

Petronilla de Grandmesnil, Countess of Leicester was the wife of Robert de Beaumont, 3rd Earl of Leicester, known as "Blanchmains". After a long widowhood, she was buried in Leicester Abbey after her death on 1 April 1212.

Petronilla, whose name is also spelled Petronila or Petronella, was the queen of Aragon from the abdication of her father, Ramiro II, in 1137 until her own abdication in 1164. She was the last ruling member of the Jiménez dynasty in Aragon, and by marriage brought the throne to the House of Barcelona.

Petronilla of Bigorre or Petronilla of Comminges was ruling Countess of Bigorre between 1194 and 1251. She was the only child of Bernard IV, Count of Comminges, and his wife Stephanie-Beatrice IV, Countess of Bigorre. Petronilla succeeded her mother in 1194 as Countess of Bigorre; she was also Viscountess of Marsan and Nébouzan through further successions. She reigned as countess for fifty-seven years, in which time she was married five times.

Petronilla of Aquitaine was the second daughter of William X of Aquitaine and Aenor 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.