Gregory Peck | Gregory of Tours | Order of St. Gregory the Great | Gregory Bateson | Pope Gregory VII | Gregory of Nyssa | Pope Gregory XIII | Pope Gregory XVI | Lady Gregory | Gregory S. Paul | Gregory Corso | Pope Gregory XV | Gregory of Nazianzus | Pope Gregory XI | Philippa Gregory | Gregory the Illuminator | Gregory Olsen | Gregory Blaxland | Dick Gregory | Pope Gregory I | Gregory Reinhart | Gregory Deyermenjian | Gregory Crewdson | Gregory Benford | Francis Thomas Gregory | Andre Gregory | Pope Gregory X | Pope Gregory VI | Jack Gregory | Gregory Thaumaturgus |
As archdeacon at Turin he was a member of the commission appointed by Pope Clement VIII to edit the Liber Septimus decretalium (later known as the Constitutiones Clementinae); and he also wrote Paratitla on the five books of the Decretals of Gregory IX.
In 1227 Wilbrand was moved by pope Gregory IX to the Bishopric of Utrecht because of his military experience, in order to replace bishop Otto van Lippe, who had died at the Battle of Ane.
In 1231, he was made a member of the commission appointed by Gregory IX to examine Aristotle's writings on the natural sciences and to offer amendments where religiously necessary.