Several medieval accounts claimed that Cunibert grew up at the court of Frankish King Clotaire II. He was ordained a priest, then was made archdeacon of Trier and in about 625 Bishop of Cologne; both cities are in Germany. He also was a royal counselor and a guardian to one of Clotaire’s grandsons. In a letter, St. Boniface said that Cunibert had hoped to evangelize among the Frisians but remained devoted to his own diocese and its people, among whom he was respected as both bishop and man. His relics were enshrined in Cologne.