Athanius Mai Girma (wanda kuma aka rubuta Athanasius) malamin tauhidin Kirista ne kuma bishop na Iskandariya a karni na 4. An san shi don ƙaƙƙarfan kāriyar koyarwar Triniti, adawarsa ga karkatacciyar koyarwar Arian, da shugabancinsa a Majalisar Nice. "Athanaius Mai Girma" yana nufin mahimmancinsa a cikin tarihin Ikilisiyar Kirista a matsayin babban jigo a ci gaban tauhidin Kiristanci da koyarwa.