Jamieson, Fausset and Brown on Acts 11:24

24. For he was a good man--The sense of "good" here is plainly "large-hearted," "liberal-minded," rising above narrow Jewish sectarianism, and that because, as the historian adds, he was "full of the Holy Ghost and of faith."

and much people were added unto the Lord--This proceeding of Barnabas, so full of wisdom, love, and zeal, was blessed to the great increase of the Christian community in that important city.

Ac 11:25, 26. Barnabas, Finding the Work in Antioch Too Much for Him, Goes to Tarsus for Saul--They Labor There Together for a Whole Year with Much Success, and Antioch Becomes the Honored Birthplace of the Term Christian.