Saint, known as Leo the Great. ?390–461 ad, pope (440–461). He extended the authority of the papacy in the West and persuaded Attila not to attack Rome (452). Feast day: Nov 10 or Feb 18
Leo I in American English
(ˈliou, Italian ˈleɔ)
noun
Saint (“Leo the Great”), a.d. c390–461, Italian ecclesiastic: pope 440–461