Θεσσαλονικεύς Thessalonikeús, thes-sal-on-ik-yoos'; from G2332; a Thessalonican, i.e. inhabitant of Thessalonice:—Thessalonian.
The KJV translates Strong's G2331 in the following manner: Thessalonians (5x), of Thessalonica (1x).
a Thessalonians
Strong's Number G2331 matches the Greek Θεσσαλονικεύς (thessalonikeus),
which occurs 6 times in 6 verses
in the TR Greek.