oh and this post oficcially makes it only 108 more posts from me left til i get a new title.... schweet...
I will help you there! I also remember Aaron has five letters
that one fact made me think of how jacob can be a name where the person changes all the time... Though Thomas was the "father" who says Thomas isnt Jacob? its plausible... time passes he gets older and name change.. we've seen these used relevantly on the show... who has 5 letters?

?
-Locke (never seen his father)
-Aaron
-Boone ( we never knew what happened to his father...) Dead not coming back
-James (never SEEN his father)
-Ilana ( Jacob coming to visit her makes more sense)
-Sayid
-Frank ( "candidatre")
-Linus
-Keamy- dead not coming back
-Miles
Cheng
-Libby (mysterious past) - dead not coming back
-Tunde (eko)
-Nader (bernard)
ok soe of these are stretches, but still 5 letters in their names... but which name ... alot of people have different names...