The Nobiliario of Pedro Conde de Barcelos names "D. Pedro Roiz de Guzman" as the son of "D. Alvaro Rodriguez de Guzman" and his wife "D. Urraca Rodriguez". "Domnus Albarus de Maxella cum fratribus meis...Petrus Roderici, Fernandus Roderici, Urraca Royz, Maria Royz, Theresa Royz" donated “hereditatem...in Bega de Sancto Michaele que iacet inter Madrigal et Turredadigo” to Burgos Cathedral by charter dated Nov 1167. "…Petrus Roderici de Guzman…" subscribed the charter dated Jun 1187 under which Alfonso VIII King of Castile founded the monastery of Las Huelgas de Burgos. "Dompnus Petrus Roderici de Guzman et uxor mea dompna Mahalt" donated property "in Ribiella del Campo" to the monastery of Las Huelgas de Burgos, as well as "filiabus nostris Teresie Petri et Marie Petri", by charter dated Feb 1194.
Mayordomo mayor of Alfonso IX King of Leon 28 Apr 1194 to 7 May 1195.
The Crónica Latina records that “Ordoño García de Roda y sus hermanos, Pedro Rodríguez de Guzmán y Rodrigo Sánchez su yerno” were killed in battle against the Moors near Alarcos. 1
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