or ARLES, was bishop of that city about the middle of the 5th century. Several letters were written to him by pope Hilarius, A.D. 461467, which are given in the Concilia, and a letter of Leontius to the pope, dated A.D. 462, is also given in the Concilia and in D'Achery's Spicilegium (v. 578 of the original edition, or 3:302 in the edition of De la Barre, Paris, 1723, folio). Leontius presided in a council at Aries, held A.D. 475, to condemn an error into which some had fallen respecting the doctrine of predestination. He appears to have died in A.D. 484. He is mentioned by Sidonius Apollinaris (Epist. 7:6). See Concil. 4, col. 1039,1041,1044 (1828, ed. Labbe); Cave, Hist. Litt. 1:449; Fabricius, Bibl. Graeca, 8:324; 12:653; Bibl. Med. et Infim. Latinitastis, v. 268 (ed. Mansi); Tillemont, Memoires, 16:38. — Smith, Dict. of Greek and Roman Biog. vol. 2, s.v.