I believe these Bible verses could lead us to believe that there was possibly a number of conversions to Christianity among the Jewish religious leaders of the time who were Pharisee. It seems possible that the apostle Paul may have been able to effectively witness the Gospel of JESUS Christ to a group of Pharisee.
Acts 23:6-9 (link)
https://www.biblegateway.com/passage/?search=Acts+23%3A6-9&version=KJV