Strong’s Greek
G3963 — Patmos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
∏άτμος
Patmos — pronounced pat'-mos
of uncertain derivation; Patmus, an islet in the Mediterranean:--Patmos.
1 occurrence in the KJV.
Revelation 1:9
I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ.