Who Was John the Apostle's Brother? Mark 1:16–20
John's brother was James, son of Zebedee, called with him from the family fishing boat. Mark's account turns quickly from the family tree to the authority of the one who called them.
Who Was John the Apostle's Father?
John the apostle's father was Zebedee, a Galilean fisherman whose boat, nets and hired hands formed the family trade. Matthew names him in a scene whose real weight falls on the call of Jesus and the costly response of two sons.
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.