Erhard of Regensburg was a seventh-century bishop and missionary who served the Catholic Church. Born around 650, likely in Narbonne, he is often identified with an abbot mentioned in a Merovingian diploma from 684. He is remembered as a traveling bishop who supported missionary efforts, eventually becoming the bishop of Regensburg. His historical life is often blended with legendary accounts, such as his role in the baptism of Saint Odilia, and he is credited with founding numerous monasteries across Bavaria and the Vosges region.