Acts 17:4

Some of them believed. Of the Jews who heard in the synagogue. Also, of the devout Greeks a great multitude. These were religious Gentiles who had departed from heathenism, attended the synagogue, but had not been circumcised.

See PNT Ac 10:2.

Of the chief women. Some of them, no doubt, the wives of the "devout Greeks". Some of the converts made during Paul's stay were idolaters (1Th 1:9). The result of these labors was the establishment of a flourishing church, the existence of which called out the two letters to the Thessalonians.
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