The characters who aren't in the Gospels.
Wikipedia says
The film introduces a number of “fictional” (non-biblical) characters. Of these, Ian Holm's Sarah has the most screen time. (Zerah is used primarily to supply Judas Iscariot with a motive for his treachery: he persuades him that an appearance before the Sanhedrin will offer Jesus an opportunity to prove himself.) Other invented characters include Quintillius, Yehuda, and Amos.My confusion here is I remember vaguely watching some people talking during a commercial break as this aired on the History Channel years ago implying that one of these, I think probably Zerah was someone known from other history just not the Gospels.
I wouldn't surprised if the History channel was just spewing bullcrap, but it's a memory that's been confusing me for awhile as one who wants to study as much about this time period as I can.
Of course all of those sound like fairly common names from the era, Josephus and the Talmud probably mention a number of people one could try to Identify as such characters if they wanted.
P.S. I had no Idea way back then that this mysterious character causing me such confusion was played by Bilbo Baggins.
When the chips are down... these "Civilized" people... will Eat each Other share