I hope this doesn't come off disrespectfully, Donamena. I just had a feeling there may be a misunderstanding here. It seems like you may be thinking the initials "gf" mean grandfather? As in the father of the grandfather owns the business. But we are referring to the father of BSLs girlfriend, so the last name being the same is probably more than a genealogical coincidence.
No, I'd never use letters like that. I was trained differently. I have a BA in anthropology from a university in New Orleans. I have my MA in history from UL-Lafayette. I have done hours and hours and hours of research in this area. With all due respect, unless you truly know who your ancestors were in 1812, you may not know who you're related to. I do know the difference between GF (girlfriend) & grand-fa, which is how a historian doing research would list it in their notes. There were no GFs in my notes, by the way, just 'sa femme' or 'gran-mere' 'novia' or 'esposa' fiancée or wife.
Contact the Center for Louisiana Studies should you ever consider finding out more. They have reams of information. So do Fr. Hébert's books. His research goes all the way back when this area was called the Attakapas Territory after a First Nation tribe that occupied much of the area. He began with records in the late 1700s. He died before he got past the 1920s, if I remember.
If you research in the birth, marriage, death, vendor-vendee, probate, brand-mark books, criminal & coroners' records, you'll see who the first families were, & how enormously inter-related they were & are. Fr Hébert also helped me with ecclesiastical records, which are closed to the public.
As I think I've explained before, there weren't very many choices in marriage. People tended to marry kin. A short look at the ecclesiastical records will tell you how many dispensations were given for first cousin marriage. The Broussard geneaology group understood this well when they set up their foundations. 250,000 relations comes from a great deal of cousins marrying cousins. It comes from 9-12 children per father & mother. If either parent died, the surviving spouse often re-married. More children. Especially if the wife died.
The professors at the UL-L history department require primary document research for a thesis. That means sitting in the courthouse day after day reading the original documents, not copies. In the original languages. Not translations. And the original maps. Not copies.
I did my thesis on a small, inter-related group who had never been documented in Louisiana history before. My thesis committee was brutal. I had 4 history professors on it, the late Director of the Center for Louisiana Studies, an archaeologist, a geographer, & a biologist. They held my feet to the fire. They were precise. I could not be otherwise.
People are free to believe whatever they wish. To find a history they believe & are comfortable with. No matter how much it would seem odd to a researcher. That's how family stories take root.
What is in the archives is all historians have to work with. It took me 3 1/2 years to finish because my subject matter was so complex. I went to the Library of Congress, the Smithsonian, & NARA. Ive been to the Louisiana State Archives in Baton Rouge. I've been to the courthouses of St Martin, St Mary, Lafayette, Evangeline, St Landry, Jeff Davis, Vernon, Rapides, Natchitoches, Calcasieu, Cameron, Acadia, St Bernard, what was left of them from fires, & Orleans. I've done my time in the trenches.
Ask my husband. He went without a home-cooked meal for that length of time. I left the house at 6:00 am & came back at 10:00 pm. I had my own key to the history department, the building, the library & the Center. I logged hundreds of hours of ethnographic fieldwork. I don't say things lightly. It may seem incorrect to others, but I've done the research to back up what I believe. And that's why I have a thesis with distinction. It means digging & leaving no stone untrurned. I'm proud of it & more than happy to be challenged by anyone. I doubt that they'd be any harder than my committee & the Dean.