 Between 1112 and 1122 Pedro served Alfonso Raimúndez in various capacities as a tutor.In the earliest instance, May 1112, he is described by Alfonso's mother, Queen Urraca, as he "who raised and nourished my son the lord king Alfonso", a fact justified by his being raised at the court of her father, the previous lord king Alfonso.On 5 July 1118, in a document from Celanova, Alfonso is called a "clientulus" ("little dependent") of Pedro.