Strong’s Greek
G1673 — Hellenikos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
Ἑλληνικός
Hellenikos — pronounced hel-lay-nee-kos'
from 1672; Hellenic, i.e. Grecian (in language):--Greek. see GREEK for 1672
2 occurrences in the KJV.
Luke 23:38
And a superscription also was written over him in letters of Greek, and Latin, and Hebrew, THIS IS THE KING OF THE JEWS.
Revelation 9:11
And they had a king over them, which is the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek tongue hath his name Apollyon.