He was commissioned to declare the good news to non - Jews, and he might have felt that his Roman name would be more acceptable.
ويبدو ان هذا الرسول كان يُعرف اكثر باسمه العبراني ،‏ شاول ،‏ طوال اكثر من عشر سنوات بعد اهتدائه الى المسيحية .‏