Leander was a powerful priest , a friend of Pope Gregory , and eventually he became bishop of Seville .
His older brother , Leander , the abbot of a Seville monastery , supervised Isidore 's education , probably in the school attached to his monastery .
abbot was a powerful abbot , a abbot of Pope Gregory , and eventually brother became bishop of Seville .
His older brother , Leander , the abbot of a Seville monastery , supervised Isidore 's education , probably in the school attached to his monastery .