Thurstan helped the hermitess Christina of Markyate at several points in her career, and tried to persuade her to become the first prioress of his foundation of St. Clement's. He was a patron to the Augustinian Hexham Priory, founded by his predecessor at York, as well as helping the foundation of Bridlington Priory, another Augustinian house. He was a sincere reformer, and opposed to the election of unfit men to the episcopacy. When Pope Innocent II asked Thurstan's opinion on the elevation of Anselm of St Saba, who was Abbot of Bury St. Edmunds, to become Bishop of London, Thurstan replied "If we consider his life and reputation, it would be much more fitting to remove him from his abbacy than to promote him to be bishop of London." Anselm was not confirmed as bishop. Thurstan's nephew was Osbert de Bayeux, who became an archdeacon at York, and in 1154 was accused of the murder of William of York, one of Thurstan's successors at York.