Unfortunately, I am POSSIBLY a Belcastel, and therefore linked to some portions of the Bondurant family. For me to be of any assistance in your study, it would have to be through an mt-DNA test. I have had a 37 marker y-DNA test, which is posted on the Gould DNA Project, but not the mt-DNA test.
My purpose in posting on the Bondurant site is that there is a strong belief in some parts of my Bonnycastle family that we are descended from the Belcastel family of the Midi-Pyrenees area in France (and therefore connected with the Bondurants). Unfortunately no documentation seems to exist that proves or disproves this belief, and the documentation would have to be 400 years or more old. A DNA test would seem to be a reasonable way to try to jump-start the process
It is my hope to convince others in our Bonnycastle family and potential Belcastel members to participate with me in a DNA project such as yours to find some connection, if it exists
Now that I know of your project, I will encourage members of the family to participate in it