There are what look like 3 names and social security numbers on John's paperwork. It looks almost identical to where you list your dependents (children) on a tax form. I saw this info on another site's forum. Someone also wondered if Locke was the guy falling past Hurley's window in another episode, I don't remember that episode very well. So I wonder who's names and socials they are? Maybe foster parents, or his siblings? Can't be children could it?