It's a girl and they call it 'Vivvy,' which is short for Vivien.

I told Mrs.Adams she must have been reading Tennyson's _Idylls of the King_; but she said 'No, she wasn't much of a reader: Adams was, and it was some lady's name in a story that had stuck in his head, and that as her mother's name was Susan and his was Jane, she hadn't minded.'".