they, &c, i.e. the Jews. Compare Act_11:2. Rom_4:12; Rom_15:8. Gal_1:2, Gal_1:12. Col_4:11. Tit_1:10. These were Jewish Christians, called "brethren", Act_10:23, Act_11:12.
believed = were faithful. Greek. pistos.App-150.
were astonished. Greek. existemi. See note on Act_2:7.
Gentiles. Greek. ethnos. Same as "nation", verses: Act_10:22, Act_10:35.