Medardus was a 6th-century bishop who served the people of northern France during the Merovingian era. Born in Salency, he eventually succeeded Alomer as the Bishop of Vermand before moving the episcopal seat to the more fortified city of Noyon. He also managed the diocese of Tournai, creating a union between the two sees that lasted for centuries. A counselor to King Clotaire, he was highly respected for his piety and knowledge during a period of significant political transition following the fall of the Western Roman Empire.