The Mary Celeste was the name of a ship found floating empty, all crew and passengers missing and never recovered and there was never any explanation. She's sometimes called the Marie Celeste, so it's close enough. So not quite a ghost ship but there was definitely vanishing involved!
I think it's a lovely name for her, and I agree with Greyhaunt, it's very fitting with how delicate and ghostly she looks! Especially against the white couch and backdrop, it looks like she might fade away at any moment. Such a pretty girl.