'Converts' in the Bible

When the congregation of the synagogue had been dismissed, many of the Jews and the devout converts to Judaism followed Paul and Barnabas, who, talking to them were urging them to continue in the grace of God.

But some from the sect of the Pharisees who had believed [in Jesus as the Messiah] stood up and said, “It is necessary to circumcise the Gentile converts and to direct them to observe the Law of Moses.”