i will be getting a boston terrier soon and have three name for her but can't deside which to choose : Baby, Peggy or Peaches please help me

Wait till you get her, mine always start as puppy puppy, then they get a 'proper name' then the family change it to something else, then the nick name sticks. In time you will forget what it was you wanted to call it.

Yes, I agree with Jackie H, wait until you get her home before you decide on a name :)  One of the 3 you have chosen might suit her to a T, but you may well get her home and she'll do something that will instantly conjure up a suitable name for her in your minds!

Good luck with your new puppy!

Lesley