Acts 6:9

‘But there arose certain of those who were of the synagogue called the synagogue of the Libertines, and of the Cyrenians, and of the Alexandrians, and of those of Cilicia and Asia, disputing with Stephen.'

So Stephen boldly went into the Hellenistic Jewish synagogues in Jerusalem and proclaimed Christ. And the description suggests that there he disputed with many who disagreed with him. We do not know whether this was one synagogue where all these types met, or a number of synagogues such as a synagogue of the Freedmen (Libertines), a synagogue for Cyrenians, a synagogue for Alexandrians (Egyptians), and one for Cilicians and Asians. But the participants were all firm in their beliefs, and we can almost certainly presume that some Pharisees were involved, for as knowledgeable in the Law and in the Scriptures they would unquestionably involve themselves in such a situation.

The Libertines were possibly composed of freedmen who having been released from slavery tended to group together and make common cause. They may well have formed a separate synagogue, for a synagogue could be set up by ten or more adult males. The Cyrenians and Alexandrians were from North Africa. The Cilicians and Asians were from the north. The Cilicians may well have included Saul (Paul) among their number.