Welcome aboard Wolfie,

The names of the characters you start with as well as a description of their skills and personality traits is defined in the file descr-strat located here --> C:\Program Files\The Creative Assembly\Rome - Total War\data\world\maps\campaign\imperial_campaign. As far as I know, those ARE their real names as the game sees them. If you're intending to edit their names I would be careful as there is probably a cross-reference table somewhere that this file uses with the names repeated there. I would ask one of our serious experts in game editing for advice before proceeding. There is likely someone within the guild who has already done this and left advisory notes posted on this website. So you might want to nose around the Guild website a bit as someone has likely done this before.