Fridugisus, also known as Fredegisus or Fredegis of Tours (born in England towards the end of the 8th century; died in Tours around 834), was a monk, teacher, and writer. An Anglo-Saxon, he was a pupil of Alcuin, first at York and afterwards at the court of Charlemagne in Aachen. The approximate date of his birth is determined by a reference to him as "a boy" (puer) in a letter of Alcuin dated 798. He was a favourite pupil of Alcuin and was one of the group of distinguished scholars who formed the Schola palatina in Aachen, in which he was known by the name Nathaniel. At that time he was a deacon.