Be careful, there are deep spoilers in the spoiler sections here.
There is a part in Battleship Bay, as you're heading through the turnstile to the ticket stand, at the moment:
Right before the section where you choose whether to pull your gun on the ticketer or not
where an NPC mistakes you for someone named "Annabelle". Elizabeth also exclaims, "Well, that was odd". Is there a meaning to this? I've already finished the game, so I'm particularly wondering if:
This NPC has mistaken her for someone else in a different universe where she wasn't sold to Lutece. I'm assuming the significance is that she is mistaking her for Anna, which would still be her name if she grew up as Booker's daughter.
Why did this lady mistake her for someone named Annabelle?
Best Answer
That NPC's name is Esther Mailer. She purposely asked Elizabeth if her name was "Annabelle", so Elizabeth would correct her and confirm Elizabeth's name and identity. She was tasked to track and stop the "False Prophet", Booker DeWitt from taking Elizabeth.
From her Voxophone log, "Take Her Alive":