Re: blais & Jeanvenne
I have the marriage you are looking for in my database:
Jean-Baptiste Blais m. Marie-Angelique Venne 7 Jul 1794, St-Cuthbert, Berthier, Quebec.
Parents are Francois-Xavier Blais and Marie-Genevieve Dubois.
I have three children for the Blais/Venne marriage, including:
Edouard Blais m. Emilie Savoie 7 Jan 1834 St-Cuthbert
Jean-Baptiste Blais m. Louise Drouin 8 Oct 1821 St-Cuthbert
Francois-Xavier Blais m. Josephte Laliberte 28 Feb 1832 St-Cuthbert
Hope that helps.