[Opinions] Re: BABY GIRL???
"Baby Girl/Boy Surname" is often put on hospital records if the people leave the hospital before naming the child. You are not obligated to name a baby before you leave the hospital (I think you have a week or something), so sometimes the records won't show the name. I am pretty sure that is why the name "Baby" shows up on the popularity charts occasionally.
Though I'm sure somewhere out there is a person named Baby.