Moduin, Modoin, or Mautwin (Latin: Moduinus, Modoinus, c.770–840/3) was a Frankish churchman and Latin poet of the Carolingian Renaissance. He was a close friend of Theodulf of Orléans, a contemporary and courtier of the emperors Charlemagne and Louis the Pious, and a member of the Palatine Academy. In signing his own poems he used the pen name Naso in reference to the cognomen of Ovid. From 815 (or earlier) until his death he was the Bishop of Autun.