Silvin of Auchy was a 7th-century bishop and evangelist who operated within the region of Thérouanne in northern France. Born into a prominent family in Toulouse around 650, he initially lived at the royal courts of Childeric II and Theodoric III. After choosing to renounce marriage and worldly status, he traveled to Rome to be ordained. He later served as a traveling bishop, focusing his missionary work on preaching the Gospel throughout the northern territories before retiring to a Benedictine monastery.