Cerbonius was a 6th-century bishop of Populonia who lived during the era of the Barbarian invasions. Born in North Africa, he fled to Italy alongside other clergy to escape Arian Vandal persecution. He eventually served as a bishop in Tuscany, where he was noted for his unique liturgical practices. Recognized as a thaumaturge, he is remembered for his ability to perform miracles, including the taming of wild geese and his encounter with a bear during the Ostrogothic invasion.