The butterfly also is the symbol for Lupus along with the purple colour ribbon. It is used because of the hope/transformation aspect but also because many of us have the malar rash which looks like a butterfly across our nose and cheeks...think it probably is a bit nicer than the "wolf" connection (we have a wolf mask and the lesions were in past times said to look like wolf bites/scratches). Personally I like the wolf connection...but to each their own:)
Anyway, good luck with your naming quest....lots of good ideas from our fellow quilters.