The Roman martyrology lists eight saints by this name; other martyrologies list more. The most noteworthy are the following:
Aemilian, martyred at Dristra (Romania) under the Emperor Julian the Apostate.
Feast: July 18.
Aemilian of Cogolla (also called Emilian Cucullatus and Emilian-with-the-Hood), hermit, parish priest; d. Tarazon, Aragon, 574; the abbey of S. Millán de la Cogolla was built at his hermitage and has his relics. His life was written by braulio; he is regarded as a patron of Spain.
Feast: Nov. 12.
Aemilian, Bishop of Cyzicus, ninth century; he opposed Emperor Leo V the Armenian in the controversy over iconoclasm and died in exile as a result.
Feast: Aug. 8.
Aemilian, Bishop of Nantes, perhaps in the eighth century; though he is not named in the early lists of bishops of Nantes, legend claims he fought against the Saracens near Autun.
Feast: Sept. 3.
Aemilian (also Eminian) of Lagny, abbot, d. c. 648; an Irish disciple of St. fursey (furseus), he succeeded him as abbot of Lagny-sur-Marne.
Feast: March 10.
Bibliography: b. dutton, La "Vida de San Millán de la Cogolla" de Gonzalo de Berceo (London 1967). Acta Sanctorum July 4:370–376. j. dubois, Catholicisme 4:52. i. m. gomez, Dictionnaire d'histoire et de géographie ecclésiastiques 15:406–412. a. butler, The Lives of the Saints, ed. h. thurston and d. attwater (New York 1956) 4:321–322. a. m. zimmermann, Lexicon für Theologie und Kirche, ed. j. hofer and k. rahner (Freiburg 1957–65) 1:438. Acta Sanctorum Aug. 2:353; Oct. 11:196. v. grumel, Catholicisme 4:51–52. Bibliotheca hagiographica latina antiquae et mediae aetatis 1:105. j. l. baudot and l. chaussin, Vies des saints et des bienhereux selon l'ordre du calendrier avec l'historique des fêtes (Paris 1935–56) 9:75–76. g. bardy, Catholicisme 4:52–53. Acta Sanctorum March 2:45.
[b. l. marthaler]
"Aemilian, Ss.." New Catholic Encyclopedia. . Encyclopedia.com. (August 21, 2018). http://www.encyclopedia.com/religion/encyclopedias-almanacs-transcripts-and-maps/aemilian-ss
"Aemilian, Ss.." New Catholic Encyclopedia. . Retrieved August 21, 2018 from Encyclopedia.com: http://www.encyclopedia.com/religion/encyclopedias-almanacs-transcripts-and-maps/aemilian-ss