It’s either really cool or social statistics run amok (or both), but here is a social network map of the relationships in the New Testament. It’s done by the folks at the English Standard Version Bible.
Obviously the New Testament is not a sociometric survey, so what we learn here is the Bible’s description of relationships. So, for all we know Luke and Titus were drinking buddies. Still, it’s a useful description of this aspect of the New Testament.
I was surprised by Peter’s circle being bigger and more central than Paul’s–speaks to Peter’s role in early church leadership.
(Click for larger size)