So I was looking over documents today and I got to the marriage license of J.B. and Angela LeRoy. J.B. signed his name as Junior. This leads me to believe that his grandfather is probably not named Jean Baptiste Vienne. Then who is Chacto to Jean Baptiste Sr.?
This brings up an interesting point and one that we had started debating via email. Before I move onto that discussion however, I would like to address your question. Although not necessarily common practice at the time, some people who are a "III" generation will revert to using "Sr." & 'Jr." once the first generation passes on. So this should be used as supporting evidence, but I wouldn't use it as proof either way.
I will start a new discussion point to document earlier evidence we were using for our deliberations.