I asked that this board be created because My last name is Buatte, and in my genealogical research, I have found that the name came from du Buat as far back as 16th Century France (at least, that's as far as I've gone yet...). The name, being French in a non French-speaking part of the world, has undergone several metamorphoses, including du Buat, Buyat, Buiat, Buat, and finally, Buatte. (I've even found a Civil War pension record for a Briatte, which is undoubtedly another variation.)
I have posted some info about my family in the "Buatte" surname message board, since that is my own name.
Please, if you have any relatives that have any of these variations of Buat, DO share with others and myself!