I do some research at Ottawa Naional Achives, maybe once a year . Sometimes at the Quebec archives in Gatineau. I'm not sure where Mme tremblay does hers.
I did go through the Loiselle (St-Pierre) fiches last summer and his mariage was there did not find a mariage that could connect him to a brother or sister or parents. Found his mariage about 20 years ago at the Quebec Arghives, then in Hull.I found it under St-Pierre Deschamps Jussaume in a mariage repertory book compiled by priece Irené Jetté. Not the same Jetté as the dictionary as far as I know . Did check the Drouin dictionary, does not seem to have a connection to the St-Pierre's or Deschamps's. Only under Jussaume, for they we're in Contrecoeur at that point and let Jussaume's name drop and took St-Pierre, this is where I found Denis Jussaume's mariage not in the Jetté dictionary but in the Drouin. In Tremblay dictionary they have Laurent St-Pierre's wedding also his son's Olivier and his grandson Olivier. I already had those. Now in the 1851 census Laurent is coated as being born in Lower Canada so is Marie-Louise and their daughter Zoé.In his mariage certificate the witness's are Jean-Baptiste Cadotte, he's the witness at several religous ceremony on that page and also at François Olivier's baptism.There is also a Charles Fisette and a Joseph Leblanc, Would you know if these two fit into the Jussaume tree at that time frame? When his daugter Angélique maries in Notre-Dame, Ottawa, On on the 1st of July 1851 to Alexis Gosselin one of the witness is Adèle Leblanc with Joseph Chaput. Have not found a connection between Joseph and Adèle Leblanc.The godparent's to François Olivier, Marie Guertin possibly Marie-Louisr's sister, Olivier Michelon is a bigger mystery, Might be in the Jussaume family tree. I think this is all for now Thank You Diane St-Pierre