Nathanael, Philip, and Bartholomew in John 1
The Bible never calls Nathanael Bartholomew. John 1:45–51 shows a friend bringing a skeptical man to Jesus, who knows him before they meet and promises a greater revelation still to come.
Philip the Apostle: Called, Then Sent to Nathanael
Philip appears in John's Gospel first as a man called directly by Jesus, then as a man who immediately went to find someone else. His most characteristic act is not a speech but an invitation.
Nathanael in John 1: Is He Bartholomew?
John 1:43–51 gives us Philip's invitation, Nathanael's honest doubt, and Jesus naming a man he had never met. The name Bartholomew appears nowhere in it, which is why the link between the two rests on comparing the Gospel lists.
Who Was Under the Fig Tree? Nathanael in John 1
The man under the fig tree was Nathanael, the friend Philip brought to Jesus. Jesus had seen him before Philip called, and that private knowledge drew out his confession of faith.