Cheating to add traits, how do i do it?

The game engine will randomly choose an internal name for your character when he is born. Since it is random, there is a chance that the name will be the exact same name as someone who already exists. The game engine has no problem with people sharing the same external and internal names, it is just scripting (and thus cheats) that are screwed up. So, it is possible and, in long campaigns, common for characters to have the exact same internal name without any game problems.