Hello !I have the answer to your query ! Better late than never...
Joseph Raymond Pleau and Philomène Moreau were married on Jan-25-1858 in St-Francis of Batiscan. The original certificat doesn't mention Pleau'parents only that he is a navigator.Philomène'parents are François-Léandre Moreau and Anasthasie Adam.
Now, to find Pleau'parents, I had to find a sibling. I knew that Joseph and Philomène had a son named Louis Pleau baptised on Jan-20-1875 in Ste-Anne-de-la-Pérade. The certificat in his case stated that the god-father was Pierre-Nazaire Pleau (uncle) and the god-mother was his aunt Zéphire Douville.
So Pierre-Nazaire and Joseph are brothers.
So I kept digging and I found the wedding certificat for Nazaire and Zéphire (02-21-1861 in La Pérade) stating that Nazaire was a widower from Marie Marsan dit Lapierre (10-21-1850 St-Ours) and BINGO on the last certificat I found out that Joseph and Nazaire's parents were Pierre Pleau and Marie-Louise Lefebvre.
RECAP: PS the date are in this order: MONTH-DAY-YEAR
Louis and Aglaé Rompréx 06-06-1898 Ste-Anne-de-la-Pérade
Joseph Raymond and Philomène Moreaux 01-25-1858 St-Francis Batiscan
Pierre & Marie Louise Lefebvrex 08-07-1821 Ste-Anne-de La-Pérade
Joseph-Louis & Madeleine Chaillé x 01-10-1780 Cap-Santé
Louis-Joseph & Madeleine Lefebvrex 02-20-1748 Les Écureuils