My great great grandfather Alexandre Marcotte b. Mar 17,1859 d.Oct 27,1936 married Rosalie Sennette of St. Mary Parish b.1840 d.Dec 17,1933. Her parents were Urbain Sennette m. Marie Alexandre. This was his second marriage. His first marriage was to Louisa Sparks, a Chitimacha Indian, b.1862 d.1903.
If you have run across any of these people, please let me know. Hope this helps.