Tuotilo or Tutilo OSB was a Frankish monk at the Benedictine Abbey of Saint Gall. He was a composer, and according to Ekkehard IV a century later, also a poet, musician, painter and sculptor. Various trope melodies can be assigned to Tuotilo, but works of other mediums are attributed with less certainty. He was a student of Iso of St. Gallen and friends with the fellow monk Notker the Stammerer.