Petronilla of Aragon (b. 1135)
Petronilla (29 June/11 August 1136 – 15 October 1173), whose name is also spelled Petronila or Petronella (Aragonese Peyronela or Payronella, and Catalan: Peronella), was the queen of Aragon from the abdication of her father, Ramiro II, in 1137 until her own abdication in 1164. After her abdication she acted as regent during the minority of her son (1164–1173). She was the last ruling member of the Jiménez dynasty in Aragon, and by marriage brought the throne to the House of Barcelona.