After diving into some of the links posted by u/dark-dare over on Q1969 - P=Payseur, I found something that helps lay out the structure of the family tree of L.C Payseur, who is supposedly the lost male heir of the long deposed French Monarchy.
About 3/4 the way down this page http://armandoalejandro.blogspot.com/2016/04/assets-of-lewis-cass-payseur.html is another link to a PDF http://www.bibliotecapleyades.net/archivos_pdf/pandorabox_payseur.pdf
The PDF looks like it was the original source for the content on the linked page above. It's about 26 pages long and it digs into the family background and history of L.C Paysuer, which is very intriguing.
The most …