Strong’s Greek
G2389 — Iannes
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
Ἰάννης
Iannes — pronounced ee-an-nace'
of Egyptian origin; Jannes, an Egyptian:--Jannes.
1 occurrence in the KJV.
2 Timothy 3:8
Now as Jannes and Jambres withstood Moses, so do these also resist the truth: men of corrupt minds, reprobate concerning the faith.