#2389 Ἰάννης Iannes {ee-an-nace'}

 of Egyptian origin; TDNT - 3:192,344; n pr m

—Greek Word Study (Transliteration-Pronunciation Etymology & Grammar)

 Janna = "he vexed"
 1) he and Jambres, were two Egyptian magicians who in the presence of
    Pharaoh imitated the miracles of Aaron in order to destroy his
    influence with the king. The author of the epistle derived their
    names from the tradition of the Talmudists and the Rabbins

—Thayer's (New Testament Greek-English Lexicon)

—Strong's (Greek Dictionary of the New Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - Jannes 1; 1

—Exhaustive Concordance (KJV Translation Frequency & Location)