Prevost Family Tree

I am the great-granddaughter of Antoine and Olympe Prevost, from Biloxi, MS. My grandparents were Sargis Prevost and Yvonne Marie Landry (maiden name)Prevost. Sargis Prevost was a boxer in Biloxi, MS. Yvonne died around age 40 of breast cancer. I believe my Prevost family lineage may be from Lyon, France but this remains undocumented. Anyone with connections to this family tree please contact me if it pleases you. Merci.