Following, from Louisiana Melting Pot (accessed October 28, 2014), is my line. Census for 1850 (jpg) shows both Louis Epinett and Derothé as born in Louisiana and both 53 years old, which would mean they were born in 1797 (census sources being what they are, 1793 and 1795 listed below may be correct).
5 Louis Marie CHAUVIN , Sr. b: 14 JAN 1702 d: ABT 1754
+ Angelique PERTHUIS b: 15 SEP 1721 d: 8 FEB 1791
6 Louis Marie CHAUVIN , Jr. b: 1752 d: 1820
+ Marie Anne FRANCOEUR b: BET 1748 AND 1756[m Feb. 16, 1770 supported below]
+ Louis EPPINETTE , Jr. b: 22 MAR 1793 d: AUG 1865
Louis Chauvin & Marianne Francour, Feb. 16, 1770 in Orleans, Calcasieu Parish, from online collection of marriages (accessed June 1, 2014)
Daughter Marie Anne Chauvin born Mar 8, 1772; baptized Feb 27, 1773, PCP [St Francis, Point Coupee]. Parents: Louis and Marie Anne Francoeur; sponsors Paul Chauvin and Marguerite Cheval, spouse Duval.
Following entry may or may not be for Marie Anne (Francoeur) Chauvin. "this city" not specified, but New Orleans assumed (transcription from "Sacramental Records of the Roman Catholic Churce of the Archdiocese of New Orleans"):
MARIANNE CHAUVIN, native of this city, about 70 years, buried Dec 12, 1811 (SLC) [St Louis Cathedral], from Rootsweb (accessed October 28, 2014)
Profile and biography for Marie Anne (Francoeur) Chauvin entered by Liz Shifflett, October 2, 2012
The WikiTree profile Francour-1 was created through the import of Tom Roland Family Tree.ged on May 6, 2012 by Tom Roland. It was merged into Francoeur-16 on December 2, 2012. See the Changes page for the details of edits by Tom and others. Source citation: S-1380164248.
It may be possible to confirm family relationships with Marianne by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Marianne:
As found in "Sacramental Records of the Roman Catholic Church of the Archdiocese of New Orleans", Diocese of "Baton Rouge" and "Southwest Records" LOUIS CHAUVIN DE BEAULIEU (dec. Louis and dec. Charlotte Duval) a native of this parish, militia officer, costal guard of Tchoupitoulas married Marie Margueritte Hazeur June 1, 1762 . . .