Teodosi abati (Mogarissos, Kapadokia, leo nchini Uturuki, 423 hivi – Yerusalemu, Israeli, 529) alikuwa mmonaki aliyeanzisha na kuratibu maisha ya kijumuia huko Palestina. Pia alishika sana imani sahihi ilivyofundishwa na Mtaguso wa Kalsedonia na kwa ajili hiyo aliwahi kudhulumiwa na serikali ya Dola la Roma Mashariki. Tangu kale anaheshimiwa na Wakatoliki na Waorthodoksi kama mtakatifu. Sikukuu yake huadhimishwa tarehe 11 Januari. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko Martyrologium Romanum Ὁ Ὅσιος Θεοδόσιος ὁ Κοινοβιάρχης καὶ Καθηγητὴς τῆς Ἐρήμου Attwater, Donald and Catherine Rachel John. The Penguin Dictionary of Saints. 3rd edition. New York: Penguin Books, 1993. ISBN|0-14-051312-4. St. Demetrius of Rostov, Marretta, Fr. Thomas (Translator). The Great Collection of The Lives of the Saints, Vol V: January. Chrysostom Press, 2002. ISBN|1-889814-04-0 Papadopulos, Leo (Translator). Four Great Fathers: Saint Paisius the Great, Saint Pachomius the Great, Saint Euthymius the Great, and Saint Theodosius. Holy Trinity Monastery, 2007. ISBN|0-88465-139-8 St. Nikolai Velimirović, Tepsić, Fr. T. Timothy (Translator).