I am not sure I am able to help on your specific quest. As you may surmise from my previous question I am searching for my great grandmother's origins which I believe to be from the village/city/town of Montauban, in the department of Tarn et Garonne France, which is north of Tolouse.
The name you have,Hyppoltye Francois Bouffet Marquis de Montauban. Seems to be a pretty well known figure from a simple google search which turns up tons of intformation (and pretty interesting), but i have no more information on for you than the search engine can provide.
Wish I could be of more help here.