[1][2] He was the prior of the monastery of San Salvador de Leire from 1054 until his election as bishop.
According to the Crónica de los reyes de Navarra of Prince Charles of Viana (died 1461), Sancho "gave great gifts to [the cathedral of] Santa María de Pamplona and to Bishop Don Blasco.
"[1] In 1076, Sancho IV was assassinated and Álava was annexed by Castile.
As a result, Fortunio was deprived of Leire and Blasco became abbot.
His successor, García Ramírez, was deprived of the abbacy before being also deposed as bishop, and they were never united again.