Someone on Wikipedia says:
The current version of the article states "Paul the Apostle did not change his name from Saul. He was born a Jew, with Roman citizenship inherited from his father, and thus carried both a Hebrew and a Greco-Roman name from birth. Luke indicates the coexistence of the names in Acts 13:9: "...Saul, who also is called Paul..."." <---- I don't think this is evidence enough to call the naming a "misconception". Acts 13:9 is both the last time Saul is called by that name and the first time he is called Paul. The switch in the text is immeduate and permanent. So while there might legitimately be debate about the relationship between the two names, I think calling the name-change a misconception is much too strong, and this section should accordingly be removed from the article.