Pioni wa Smirna (alifariki Smirna, leo nchini Uturuki, 250 hivi) alikuwa padri aliyefia dini ya Ukristo wakati wa dhuluma ya kaisari Decius. Hati za kifodini chake zimetunzwa hadi leo. Tangu kale anaheshimiwa na Kanisa Katoliki na Kanisa la Kiorthodoksi kama mtakatifu mfiadini. Sikukuu yake huadhimishwa tarehe 11 Machi. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko Lee, A. D. (11 August 2015). Pagans and Christians in Late Antiquity: A Sourcebook. Routledge, 52. ISBN 978-1-317-40862-8.  http://www.santiebeati.it/dettaglio/44510 Lane Fox, R. 1986, Pagans and Christians in the Mediterranean world from the second century AD to the conversion of Constantine, Penguin Books, London, p.460-492 Ehrman, Bart D. (10 January 2013). Forgery and Counter-forgery: The Use of Literary Deceit in Early Christian Polemics. OUP USA, 504. ISBN 9780199928033. Retrieved on 8 January 2018.  Castelli, Elizabeth Anne (2004). Martyrdom and Memory: Early Christian Culture Making. Columbia University Press, 92. ISBN 978-0-231-12986-2.  Pesthy-Simon, Monika (20 June 2017). Isaac, Iphigeneia, Ignatius: Martyrdom and Human Sacrifice.