John Gill Commentary Acts 19:17

"And this became known to all, both Jews and Greeks, that dwelt at Ephesus; and fear fell upon them all, and the name of the Lord Jesus was magnified." — Acts 19:17 (ASV)

And this was known to all the Jews
These men being Jews: and Greeks also dwelling at Ephesus: for though it was done in a private house, yet there might be many spectators and witnesses, both Jews and Greeks, who spread this fact about the city, and who, were to be depended upon:

and fear fell on them all ;
on the enemies of Christ and his Gospel, so that others were deterred from making such an attempt for the future:

and the name of the Lord Jesus was magnified ;
which had such power over evil spirits, and whose power they themselves acknowledged: this was done by them that believed in Christ, who thought and spoke the more highly of him; and who more strongly believed in him, and so magnified him, and gave more glory to him; Christ is great in himself, and he is magnified and made great, when he is declared to be so, and is treated as such.