Bertin

Bertin was born near Constance and became a monk at Luxeuil in France. He helped Saint Omer, bishop of Thérouanne, and became abbot of Sithiu, a monastery which later took the name Saint-⁠Bertin. The monastery flourished under him, and he also founded many new monasteries. He reposed around the year 709. He is a saint of the undivided Church, venerated in the West.

His commemoration falls on 5 September (new calendar); the Churches on the Old Calendar keep the same day of the Menaion on 18 September of the civil calendar.