Piggyback question: why is Tiger such a popular name for the Miccosukee (and maybe the larger Seminole Nation)? There are no tigers in Florida, and panthers are exceedingly rare.

During the boarding school era, students were banned from using their native language and given new names. Not sure if that's the whole story as to the English surnames, or not, though.

As an aside, many Native Americans in the northern part of the US Midwest have French last names.

http://en.wikipedia.org/wiki/American_Indian_boarding_schools