Aunarius was a 6th-century bishop of Auxerre who served within the Frankish kingdom. Born into a noble family in Orléans, he was raised at the royal court of King Guntram. After being ordained by Syagrius of Autun, he rose to prominence as a presbyter and later as a bishop. Throughout his career, he participated in several significant ecclesiastical gatherings, including the Synods of Paris and Mâcon, and exerted influence over Frankish monarchs to support Roman interests.