(Νύμφις), the son of Xenagoras, a native of the Pontic Heracleia, lived in the middle of the second century, B. C., and was a person of distinction in his native land, as well as an historical writer of some note. He was sent as ambassador to the Galatians to propitiate that people, when the inhabitants of Heracleia had offended them by assisting Mithridates, the son of Ariobarzanes, with whom the Galatians were at war. (Memnon, 100.24, ed. Orelli.) As Ariobarzanes was succeeded by this Mithridates about B. C. 240, we may refer the embassy to this year. (Clinton, F. H. sub anno.)
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