Facts and Events
Petronilla became Queen of Aragon on 13 November 1137, when she was just one year old. Prior to her ascension, on 11 August the same year, she had married Ramon Berenguer IV, Count of Barcelona, who was twenty-three years older than her. Their marriage was consummated in early 1151. On 4 April 1152, at the age of almost sixteen, Petronilla wrote her will, in case she did not survive the birth of the child with whom she was pregnant, naming her unborn child heir of Aragon, in the event it was a boy. This child, indeed a boy, was born on 4 May 1152 in Barcelona and named Peter. Not much information about Peter survives, but it is known for sure that he existed. The Corónicas Navarras names all of Petronilla's children, in order, as don Pedro…el rey don Alfonso, que ovo nombre Remón Belenguer et el conte don Pedro de Provença et el conte don Sancho et a la muller del rey don Sancho de Portugal. Peter was named Count of Cerdanya, Carcassonne and Narbonne.
Some sources state that Peter died in 1157, sometime after King Alfonso VII of León and Castile died. This year of death is also likely since the third son, also named Peter, was born in 1158. It is certain that the elder son Peter was dead by 18 July 1164, as his mother abdicated in favour of his younger brother, Ramon, rather than Peter, who had been named heir of Aragon at birth. The Corónicas Navarras also stated that Peter died in Huesca.