Saint Memnon the Wonderworker was alive during the second century A.D. and hegumen of an Egyptian monastery. His feast day is April 28 (Eastern Orthodox liturgics).
In the Egyptian desert he practised religious asceticism.
He is said to have performed a number of miracles, including causing a spring to gush forth, destroying a plague of locusts, curing illnesses and saving boats from destruction.
References
Saint Memnon Wikipedia(Text) CC BY-SA