The convert Saul would eventually exchange his Jewish name for the Greco-Roman name , as he expanded his ministry to the Gentiles

Paul

Explanation:

Saul of Tarsus was first seen in biblical accounts as he witnessed to the execution of Stephen, who was the first recorded martyr to the cause of Jesus Christ himself.  

Upon conversion to Christianity, he was given the name paul, which means small or humble. He remained a significant leader in the activities of the early Christian church.  

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