Descended from the founders of the monastery of Santa María de Ferreira in Pallares. "…Munimus Pelaiz…" subscribed the charter dated 16 Dec 1105 under which "Raimundus totus Gallecie consul ac Hispanie imperatoris dni. Adefonsi gener" confirmed the ancient privileges ("fueros") of Santiago de Compostela. "…Muninus Pelaici, Martinus Pelaiz…" subscribed the charter dated 14 May 1112 under which "Urraca totius Yspanie regina" confirmed the donation of the monastery of San Andrés de Trobo to Santiago de Compostela.
Señor de Monterroso. "…Nunio Pelagii senior de Monteroso…" subscribed the charter dated May 1112 under which Queen Urraca granted property to "comiti dno Petro Froyalz et uxori uestre comitisse dne Maiori Roderici de Rarzena".
Conde 8 Dec 1113. He was deprived of his lands and imprisoned in 1120 by Queen Urraca, although restored by the following year. 1