(Νυμφιδιανός), of Smyrna, a Neo-Platonist, lived in the time of the emperor Julian, and was the brother of Maximus and Claudianus. The emperor Julian, who was greatly attached to Maximus, made Nymphidianus his interpreter and Greek secretary, though he was more fit to write declamations and disputations than letters. He survived his brother Maximus, and lied at an advanced age. (Eunap. Vit. Soph. p. 137.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890