Ignace-Onesime Gravel (Ignace - Euphrosine Feuillion/Fillion) married Marie-Louise Renaud (Jacques - Marie-Louise Cloutier) on 9 February 1847 at Chateau-Richer, Quebec. Source: parish records of La Visitation Catholic Church, Chateau-Richer, Montmorency County, Quebec; volume 8, page 129, marriage record #8 in 1847; available on LDS FHL microfilm #1018163.
Ignace-Onesime's father, Ignace, born 6 November and baptized 7 November 1794 at Chateau-Richer, was the son of Joseph-Simon Gravel who married Genevieve Cazault. You will find Simon's lineage at Phyllis Nordstrom's Gravel web site at http://familytreemaker.genealogy.com/users/n/o/r/Phyllis-J-Nordstrom/GENE36-0001.html Simon and Genevieve are family group #106 on page 36-0023. From this couple, you can work your way back to Joseph-Masse Gravel and Marguerite Tavernier, the first Canadian generation of famille Gravel.
Don't attempt to contact Phyllis Nordstrom for further information. Phyllis tragically died in an auto accident in California in May 2005.