Acts 8:12: Who Was Baptized by Philip?
Acts 8:12 identifies the baptized as Samaritan men and women who believed Philip's good news about God's Kingdom and the name of Jesus Christ. Baptism follows belief here; it is the response of those who received the message.
Philip the Evangelist and the Ethiopian Official
Philip is one of the seven men chosen in Acts 6 to serve the Jerusalem church, and in Acts 8:26–40 he is sent by God to an Ethiopian official. Beginning with Isaiah, Philip preaches Jesus, and the man believes and is baptized.