Laureat Chouinard help please???Narcisse Chouinard m. Emerence PAQUIN?????? huh?

Could you please help me understand why the book
Famille Chouinard, Histoire et Genealogie has on page 122

3e Br.V
NARCISSE CHOUINARD, fils de Pierre-Louis IV et de Cathe-
rine THIBAULT
EMERENCE PAQUIN
Mariage vers 1840. V.N 7.
ENFANTS:
1. JOSEPH, ne 1844; m. 1. Edmire Bourdon; 2.
Dame Leroux.
2. NARCISSE, ne en 1850; m. 1. Marie Daignault; 2.
Melanie Longtin; dec. en 1890
3. Enerence, nee en 1851 m. Lucien Boule


*** What I'm trying to figure out is-is this book wrong?
or is PAQUIN another name for MOQUIIN?It's obvious this is
my grgrgrandmother Melanie Longtin and grandfather Chouinard
but it lists the parents as very different from what I have hhad for years as being Francois Chouinard and Marie Charlotte Coache(s).Now I'm all confused again. Please help me understand is this 1921 Genealogy book wrong or have I been looking at wrong couple for years?
Also this book lists david as brother of Pierre-Louis

Any answers to help unscramble my brain on this one is greatly and most assuredly appreciated.