Flutter is simply a NAME. Maybe her leg inspired the name, but it is nothing more than a name. Most people would not even know that her stump inspired the name if you did not tell them. And as you know, coming up with a new and different name for each 1by1 cat can be difficult, and Flutter is a name that had not been used.

With that said, if you want to rename her, than do so. MANY, MANY people rename their kitties after adoption. (but Tripod is NOT an option...LOL)