The below is from the book "D'Hauterive Billaud and allied families of Louisiana" published 1729. There is a bunch more info but it's behind paywall so I can't paste the link. I got it from the Geneanet library, but it is also available at Family search.
<1> SIEUR LOUIS CHAUVIN DE BEAULIEU I, the first husband of Charlotte Orbanne Duval, was born in Montreal, Canada, in 1678. He was the son of Pierre Chauvin and Marthe Autreuil and one of St. Denis's companions in the Texas Expedition. Their marriage contract 1724waswitnessedby:D’Hauterive;CharlotteDuval;Lt.]osephChauvin;sit NicolasChauvinde la Freniere,his wifeMargueriteLeSueur,and his dmgluterMargueriteChauvinde la Freniere. Louiswasin hisfortiesandCharlottewasfifteenyearsold.Someofthis informationis fromA Dictionag ofLouisianaBiographyVol.1,byGlennR. Conrad. ofFrom“TheChauvinBrothers,”inLouisianaHistog,byGaryB.Mills:“LouisChauvin and his brother]ean«Baptiste,both(Canadian)voyagems, arrived in Detroit onJune14,1706. . . appar ently Louis remained only briefly in Detroit before continuing down river to the Gulf Coast settler ment to join his brothers in Mobile. Louis was one of St. Denis’ companions in the Texas Expedition of 1716 and,with]oseph Chauvin Delery and Nicholas Chauvin la Fteniete,bohght property on the Chapitoulas Coast in 1719.He is considered possibly the first in habitant or property ownerin what is now ‘OldMetairie’.”