Saint Totnan was a 7th-century Irish deacon who became an apostle in Franconia. After traveling to Rome to meet with Pope Conon, he journeyed to Würzburg alongside his companions, Saint Colman and Saint Kilian. While preaching in the region, the group encountered opposition from the wife of Duke Gozbert. This conflict led to the execution of Totnan and his fellow missionaries in 689, making him a martyr for his faith.