William of Montevergine
William of Montevergine, or William of Vercelli, (1085 – 25 June 1142), also known as William the Abbot, was a Catholic hermit and the founder of the Congregation of Monte Vergine, or "Williamites". He is venerated as a saint by the Roman Catholic Church.
Patron saint of Irpinia
In the Martyrology
- June 25 Saint Guglielmo, founder and abbot of Montevergine