Which line of Guerin are you?
An ancestor was a Guerin, and I am having a little problem with her descendents, Osite Aguillard-her son Dava & daughter in law - Patin. My line is;
Henriette Guerin married Joseph Aguillard in 1792 and I believe they produced Osite Aguillard who married George or Georgette Saizan
& produced Dava Saizan who married Zulma Patin
& produced Desiree Saizan who married Emile Pourciau
& produced Herminia Pourciau who married Emile Pourciau
& produced Tobie Pourciau who married Edna Mary Riggs
& produced Marie Pourciau my mother.
Marguerite Henriette Guerin was the daughter of Guillaume Guerin & Marie Anne Olivo.
ALL of this info came from the Diocese of Baton Rouge volumes "Catholic Church Records" which I will recommend to you, you will probably find just about all you need on Guerin from Pointe Coupee as they just about all Catholic.