Nathanael was an Israelite in whom there was no guile. Cana was the home of Nathanael. He and Bartholomew are generally thought to be the same person. Nathanael is always mentioned along with apostles, as though of apostolic rank.
If you are speaking of Nathanael, one of Christ's disciples (found in the New Testament), I'm sorry to be the bearer of negative news, but after researching my Bible (Strong's Exhaustive Concordance), I cannot find any verse which speaks of Nathanael's death.