Son of Pedro of Aragon and Ines of Aquitaine, married in 1086. He was betrothed briefly to the Cid's daughter, Sol (Maria). However Pedro Pedrez would predecease his father in 1104 and leave no children.
Maria's marriage to another man, Ramon Berenguer III the Great, Count of Barcelona, is historically documented. Pedro was succeeded by his brother, who became Alfonso I of Aragon.
Now when all this had been appointed, as ye have heard, and while they were all in the court, there came into the Palace messengers from the Kings of Aragon and of Navarre, who brought letters to King Don Alfonso, and to the Cid Campeador, wherein those Kings sent to ask the daughters of the Cid in marriage, the one for the Infante Don Sancho of Aragon, the other for the Infante Garcia Ramirez of Navarre.
He of Navarre hight Don Ramiro, and he was the son of King Don Sancho, him who was slain at Rueda; and he married with Dona Elvira, the elder: and the Infante of Aragon who married Dona Sol, the younger, hight Don Sancho, and was the son of King Don Pedro.
And the first day the Infante Don Sancho of Aragon came up, and they waited for the Infante Don Ramiro; and when they were all met they proceeded to Valencia.
When eight days were overpast the Bishop Don Hieronymo married the Infantes of Aragon and Navarre to the daughters of the Cid in this manner: the Infante Don Ramiro of Navarre to Dona Elvira, and the Infante Don Sancho of Aragon to Dona Sol.
King Don Alfonso, and the sons-in-law of the Cid, King Don Ramiro of Navarre, and the Infante Don Sancho of Aragon, with all their companies, and all the other honourable men, abode three weeks in St. Pedro de Cardena, doing honour to the Cid.
Dona Sol, who was the younger, came first, because Aragon is nearer than Navarre, and also because she was a widow; for the Infante Don Sancho, her husband, had departed three years after the death of the Cid, and had left no child.