There were about twelve men in all.
Ephesus was a city of great note in Asia, famous for a temple built there to Diana, which was one of the wonders of the world: thither Paul came to preach the gospel while Apollos was at Corinth (Act 19:1); while he was watering there, Paul was planting here, and grudged not that Apollos entered into his labours and was building upon his foundation, but...
Commenting on Acts 19:1-7
And all the men were about twelve. The Syriac, Arabic, and Ethiopic versions, have not the word "about"; but affirm, that the men were twelve; and indeed the number being so small, the historian might be at a certainty about it: these seem to be the first materials of a Gospel church at Ephesus, which afterwards was very large and flourishing, and very likely were...
Verse 7. And all the men. The whole number.