Theodemir a Goth who was abbot of Psalmodi, in the diocese of Nismes, at the beginning of the 9th century. He was reputed to be very learned, so that even bishop Claudius of Turin (q.v.; comp. Illgen, Zeitschr. fliu die hist. Theologie, 1843, 2, 39 sq.) dedicated many of his commentaries to him. Theodemir wrote a letter to Claudius, in which he mentioned the approval, which the writings of the latter received, especially from the Frankish bishops; but he subsequently discovered expressions in the commentaries, particularly those on Corinthians, which he regarded as being questionable and erroneous, the principal objection being raised against the treatment of the subject of image and relic worship. Claudius thereupon wrote an Apologeticum (see Claud. Taur. Episc. Ined. Operum Specinensa, etc., exhibuit A. Rudelbach [Havn. 1824]; Peyron, Tull. Ciceronis Orationum
Fragmenta Inedita [Stuttg. 1824], p. 13), to which Theodemir replied. The dispute was ended by the death of Theodemir about A.D. 825 (see Gieseler, Lehrb. der Kirchengesch. Vol. 2; Neander, Church Hist. 3, 433). —Herzog, Real Encyklop. s.v.