Taius (Taio, Tago, Tajo, Tajón, Tayon) (c. 600—c. 683) was a bishop of Zaragoza during the Visigothic period, from 651-664, succeeding his teacher Saint Braulius. His surname was Samuel (Samuhel). Taius, like Braulius and Bishop Ildefonsus, was also a pupil of Saint Isidore of Seville.